ibiyaya JetPaw Expandable Backpack — dimensions & which airlines it fits
ibiyaya JetPaw Expandable Backpack: 18 × 12 × 10.5 in external, up to ~17 lb. Backpack that expands to 31" of floor space at the gate; base 18×12×12 is tall, so confirm height for your airline.
It clears 5 of 58 airlines with a published limit outright, and 3 of those are an exact fit with no margin to spare (Allegiant Air, Frontier Airlines, Porter Airlines). Under-seat space varies by aircraft, so an exact fit can still fail on the day — check your specific flight. Check your pet before you buy. This one is rated up to ~17 lb.
ibiyaya publishes a weight limit only. Weight alone under-determines fit, so measure your pet lying down and check it against the carrier's interior before buying. How to measure →
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Specs
| External size (L×W×H) | 18 × 12 × 10.5 in |
| Type | soft-sided · expandable at the gate |
| Pet weight | up to ~17 lb |
| Carrier weight (empty) | 4 lb · on a combined cap this comes off your pet's allowance — e.g. 11 lb combined leaves 7 lb of pet |
Dimensions from the manufacturer product page · verified 2026-09-06
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Which airlines does the ibiyaya JetPaw Expandable Backpack fit?
Compared against each airline's published under-seat limit (height strict; footprint may rotate). Green = within the published size; amber = fits only when collapsed / flexed; grey = over.
| Airline | Its limit | This carrier |
|---|---|---|
| Allegiant Air | 18 × 12 × 11 in | Exact fit 18 × 12 × 10.5 in is within 18 × 12 × 11 in — 0" spare on length, 0" on width, 0.5" on height. Tightest margin is 0", so measure before you fly. |
| Frontier Airlines | 18 × 14 × 11 in | Exact fit 18 × 12 × 10.5 in is within 18 × 14 × 11 in — 0" spare on length, 2" on width, 0.5" on height. Tightest margin is 0", so measure before you fly. · full fit check → |
| Pegasus Airlines over its 17.6 lb combined limit once the bag is counted | 19.7 × 12.6 × 12.6 in | Fits 18 × 12 × 10.5 in is within 19.7 × 12.6 × 12.6 in — 1.7" spare on length, 0.6" on width, 2.1" on height. |
| Porter Airlines | 21.5 × 15.5 × 10.5 in | Exact fit 18 × 12 × 10.5 in is within 21.5 × 15.5 × 10.5 in — 3.5" spare on length, 3.5" on width, 0" on height. Tightest margin is 0", so measure before you fly. |
| Saudia over its 11 lb combined limit once the bag is counted | 21 × 16 × 13 in | Fits 18 × 12 × 10.5 in is within 21 × 16 × 13 in — 3" spare on length, 4" on width, 2.5" on height. |
| airBaltic | 21.7 × 15.7 × 9.1 in | Too tall (10.5" > 9.1") 10.5" tall exceeds the 9.1" limit by 1.4" and this carrier doesn't compress. |
| Austrian Airlines | 21.7 × 15.7 × 9.1 in | Too tall (10.5" > 9.1") 10.5" tall exceeds the 9.1" limit by 1.4" and this carrier doesn't compress. |
| Avianca | 22 × 14 × 10 in | Too tall (10.5" > 10") 10.5" tall exceeds the 10" limit by 0.5" and this carrier doesn't compress. |
| Brussels Airlines | 21.7 × 15.7 × 9.1 in | Too tall (10.5" > 9.1") 10.5" tall exceeds the 9.1" limit by 1.4" and this carrier doesn't compress. |
| Condor | 21.6 × 15.7 × 9 in | Too tall (10.5" > 9") 10.5" tall exceeds the 9" limit by 1.5" and this carrier doesn't compress. |
| Contour Airlines | 24 × 16 × 10 in | Too tall (10.5" > 10") 10.5" tall exceeds the 10" limit by 0.5" and this carrier doesn't compress. |
| Discover Airlines | 21.7 × 15.7 × 9.1 in | Too tall (10.5" > 9.1") 10.5" tall exceeds the 9.1" limit by 1.4" and this carrier doesn't compress. |
| Edelweiss | 21.7 × 15.7 × 9.1 in | Too tall (10.5" > 9.1") 10.5" tall exceeds the 9.1" limit by 1.4" and this carrier doesn't compress. |
| Eurowings | 21.7 × 15.7 × 9.1 in | Too tall (10.5" > 9.1") 10.5" tall exceeds the 9.1" limit by 1.4" and this carrier doesn't compress. |
| Finnair | 21.7 × 15.7 × 7.9 in | Too tall (10.5" > 7.9") 10.5" tall exceeds the 7.9" limit by 2.6" and this carrier doesn't compress. |
| ITA Airways | 21.7 × 15.7 × 9.1 in | Too tall (10.5" > 9.1") 10.5" tall exceeds the 9.1" limit by 1.4" and this carrier doesn't compress. |
| Lufthansa | 21.7 × 15.7 × 9.1 in | Too tall (10.5" > 9.1") 10.5" tall exceeds the 9.1" limit by 1.4" and this carrier doesn't compress. |
| Royal Air Maroc | 21.7 × 15.7 × 7.9 in | Too tall (10.5" > 7.9") 10.5" tall exceeds the 7.9" limit by 2.6" and this carrier doesn't compress. |
| Swiss International Air Lines | 21.7 × 15.7 × 9.1 in | Too tall (10.5" > 9.1") 10.5" tall exceeds the 9.1" limit by 1.4" and this carrier doesn't compress. |
| Aegean Airlines | 15.7 × 9.8 × 9.8 in | Too big 18 × 12 × 10.5 in is over the 15.7 × 9.8 × 9.8 in limit. |
| Air Canada | 17 × 16 × 8 in | Too big 18 × 12 × 10.5 in is over the 17 × 16 × 8 in limit. · full fit check → |
| Air Europa | 15.7 × 11.8 × 11.8 in | Too big 18 × 12 × 10.5 in is over the 15.7 × 11.8 × 11.8 in limit. |
| Air France | 18.1 × 11 × 9.4 in | Too big 18 × 12 × 10.5 in is over the 18.1 × 11 × 9.4 in limit. |
| Air Transat | 17 × 9.5 × 10 in | Too big 18 × 12 × 10.5 in is over the 17 × 9.5 × 10 in limit. |
| Alaska Airlines | 17 × 11 × 9.5 in | Too big 18 × 12 × 10.5 in is over the 17 × 11 × 9.5 in limit. · full fit check → |
| Alaska Horizon (Horizon Air) | 17 × 11 × 9.5 in | Too big 18 × 12 × 10.5 in is over the 17 × 11 × 9.5 in limit. |
| American Airlines | 18 × 11 × 11 in | Too big 18 × 12 × 10.5 in is over the 18 × 11 × 11 in limit. · full fit check → |
| American Eagle (regional, incl. Republic Airways) | 18 × 11 × 11 in | Too big 18 × 12 × 10.5 in is over the 18 × 11 × 11 in limit. |
| Asiana Airlines | 17.7 × 12.6 × 8.2 in | Too big 18 × 12 × 10.5 in is over the 17.7 × 12.6 × 8.2 in limit. |
| Avelo Airlines | 17 × 9 × 13 in | Too big 18 × 12 × 10.5 in is over the 17 × 9 × 13 in limit. |
| Azul Linhas Aéreas | 16.9 × 12.4 × 7.8 in | Too big 18 × 12 × 10.5 in is over the 16.9 × 12.4 × 7.8 in limit. |
| Breeze Airways | 17 × 8 × 13 in | Too big 18 × 12 × 10.5 in is over the 17 × 8 × 13 in limit. |
| Cape Air | 17 × 12.5 × 8.5 in | Too big 18 × 12 × 10.5 in is over the 17 × 12.5 × 8.5 in limit. |
| Copa Airlines | 18 × 11 × 11 in | Too big 18 × 12 × 10.5 in is over the 18 × 11 × 11 in limit. |
| Delta Air Lines | 18 × 11 × 11 in | Too big 18 × 12 × 10.5 in is over the 18 × 11 × 11 in limit. · full fit check → |
| EL AL Israel Airlines | 13 × 8 × 7 in | Too big 18 × 12 × 10.5 in is over the 13 × 8 × 7 in limit. |
| Etihad Airways | 15.7 × 15.7 × 8.7 in | Too big 18 × 12 × 10.5 in is over the 15.7 × 15.7 × 8.7 in limit. |
| GOL Linhas Aéreas | 16.9 × 12.6 × 9.4 in | Too big 18 × 12 × 10.5 in is over the 16.9 × 12.6 × 9.4 in limit. |
| Hawaiian Airlines | 17 × 11 × 9.5 in | Too big 18 × 12 × 10.5 in is over the 17 × 11 × 9.5 in limit. |
| Iberia | 17.7 × 13.8 × 9.8 in | Too big 18 × 12 × 10.5 in is over the 17.7 × 13.8 × 9.8 in limit. |
| JetBlue | 17 × 12.5 × 8.5 in | Too big 18 × 12 × 10.5 in is over the 17 × 12.5 × 8.5 in limit. |
| JSX | 17 × 13 × 11 in | Too big 18 × 12 × 10.5 in is over the 17 × 13 × 11 in limit. |
| KLM Royal Dutch Airlines | 18.1 × 11 × 9.4 in | Too big 18 × 12 × 10.5 in is over the 18.1 × 11 × 9.4 in limit. |
| Korean Air | 17.5 × 12.5 × 7.5 in | Too big 18 × 12 × 10.5 in is over the 17.5 × 12.5 × 7.5 in limit. |
| LATAM Airlines | 15.7 × 11 × 9.8 in | Too big 18 × 12 × 10.5 in is over the 15.7 × 11 × 9.8 in limit. |
| LOT Polish Airlines | 17.7 × 11.8 × 7.9 in | Too big 18 × 12 × 10.5 in is over the 17.7 × 11.8 × 7.9 in limit. |
| Norwegian | 16.9 × 12.2 × 7.9 in | Too big 18 × 12 × 10.5 in is over the 16.9 × 12.2 × 7.9 in limit. |
| SAS Scandinavian Airlines | 15.7 × 9.8 × 9.1 in | Too big 18 × 12 × 10.5 in is over the 15.7 × 9.8 × 9.1 in limit. |
| Southwest Airlines | 18 × 10.5 × 10 in | Too big 18 × 12 × 10.5 in is over the 18 × 10.5 × 10 in limit. · full fit check → |
| Sun Country Airlines | 17 × 12 × 9 in | Too big 18 × 12 × 10.5 in is over the 17 × 12 × 9 in limit. |
| TAP Air Portugal | 17.7 × 11.8 × 9 in | Too big 18 × 12 × 10.5 in is over the 17.7 × 11.8 × 9 in limit. |
| Transavia | 15.7 × 11.8 × 9.4 in | Too big 18 × 12 × 10.5 in is over the 15.7 × 11.8 × 9.4 in limit. |
| Turkish Airlines | 15.7 × 11.8 × 9.1 in | Too big 18 × 12 × 10.5 in is over the 15.7 × 11.8 × 9.1 in limit. |
| United Airlines | 18 × 11 × 11 in | Too big 18 × 12 × 10.5 in is over the 18 × 11 × 11 in limit. · full fit check → |
| Viva Aerobus | 17.3 × 13.8 × 8.3 in | Too big 18 × 12 × 10.5 in is over the 17.3 × 13.8 × 8.3 in limit. |
| Volaris | 17.3 × 11.8 × 7.5 in | Too big 18 × 12 × 10.5 in is over the 17.3 × 11.8 × 7.5 in limit. |
| Vueling | 17.7 × 15.4 × 8.3 in | Too big 18 × 12 × 10.5 in is over the 17.7 × 15.4 × 8.3 in limit. |
| WestJet | 16 × 10 × 8.5 in | Too big 18 × 12 × 10.5 in is over the 16 × 10 × 8.5 in limit. |
| Aeroméxico over its 19.8 lb combined limit once the bag is counted | not published | Size not published Aeroméxico does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Aeroméxico before you book. |
| Croatia Airlines | not published | Size not published Croatia Airlines does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Croatia Airlines before you book. |
| Mokulele Airlines | not published | Size not published Mokulele Airlines does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Mokulele Airlines before you book. |
| Southern Airways Express over its 15 lb combined limit once the bag is counted | not published | Size not published Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. |
| Aer Lingus | not published | No cabin pets Aer Lingus does not accept pets in the cabin, so carrier size is not the deciding factor. Check Aer Lingus's own policy for cargo or approved pet-shipper options. |
| Air New Zealand | not published | No cabin pets Air New Zealand does not accept pets in the cabin, so carrier size is not the deciding factor. Check Air New Zealand's own policy for cargo or approved pet-shipper options. |
| ANA (All Nippon Airways) | not published | No cabin pets ANA (All Nippon Airways) does not accept pets in the cabin, so carrier size is not the deciding factor. Check ANA (All Nippon Airways)'s own policy for cargo or approved pet-shipper options. |
| British Airways | not published | No cabin pets British Airways does not accept pets in the cabin, so carrier size is not the deciding factor. Check British Airways's own policy for cargo or approved pet-shipper options. |
| Cathay Pacific | not published | No cabin pets Cathay Pacific does not accept pets in the cabin, so carrier size is not the deciding factor. Check Cathay Pacific's own policy for cargo or approved pet-shipper options. |
| China Airlines | not published | No cabin pets China Airlines does not accept pets in the cabin, so carrier size is not the deciding factor. Check China Airlines's own policy for cargo or approved pet-shipper options. |
| easyJet | not published | No cabin pets easyJet does not accept pets in the cabin, so carrier size is not the deciding factor. Check easyJet's own policy for cargo or approved pet-shipper options. |
| Emirates | not published | No cabin pets Emirates does not accept pets in the cabin, so carrier size is not the deciding factor. Check Emirates's own policy for cargo or approved pet-shipper options. |
| Icelandair | not published | No cabin pets Icelandair does not accept pets in the cabin, so carrier size is not the deciding factor. Check Icelandair's own policy for cargo or approved pet-shipper options. |
| Japan Airlines | not published | No cabin pets Japan Airlines does not accept pets in the cabin, so carrier size is not the deciding factor. Check Japan Airlines's own policy for cargo or approved pet-shipper options. |
| Qantas | not published | No cabin pets Qantas does not accept pets in the cabin, so carrier size is not the deciding factor. Check Qantas's own policy for cargo or approved pet-shipper options. |
| Qatar Airways | not published | No cabin pets Qatar Airways does not accept pets in the cabin, so carrier size is not the deciding factor. Check Qatar Airways's own policy for cargo or approved pet-shipper options. |
| Ryanair | not published | No cabin pets Ryanair does not accept pets in the cabin, so carrier size is not the deciding factor. Check Ryanair's own policy for cargo or approved pet-shipper options. |
| Singapore Airlines | not published | No cabin pets Singapore Airlines does not accept pets in the cabin, so carrier size is not the deciding factor. Check Singapore Airlines's own policy for cargo or approved pet-shipper options. |
| Virgin Atlantic | not published | No cabin pets Virgin Atlantic does not accept pets in the cabin, so carrier size is not the deciding factor. Check Virgin Atlantic's own policy for cargo or approved pet-shipper options. |
"Fits" here means it's within the published maximum — the actual space under your seat varies by aircraft. See why →
Not sure this is the one? See the best carriers ranked by how many airlines they fit · compare all: carriers · fit for a specific airline: Aegean Airlines · Aer Lingus · Aeroméxico · Air Canada · Air Europa
Common questions
What are the dimensions of the ibiyaya JetPaw Expandable Backpack?
Its published external size is 18 × 12 × 10.5 in, rated for up to ~17 lb. Source: the manufacturer's product page.
Which airlines does the ibiyaya JetPaw Expandable Backpack fit?
Against published limits it fits Allegiant Air, Frontier Airlines, Pegasus Airlines, Porter Airlines, Saudia, Aeroméxico, Croatia Airlines, Mokulele Airlines, Southern Airways Express, Aer Lingus, Air New Zealand, ANA (All Nippon Airways), British Airways, Cathay Pacific, China Airlines, easyJet, Emirates, Icelandair, Japan Airlines, Qantas, Qatar Airways, Ryanair, Singapore Airlines, Virgin Atlantic. Real under-seat space varies by aircraft, so confirm for your flight.