35 × 20 × 20 cm under-seat bag: who uses it, and bags that fit

35 × 20 × 20 cm is 13.8 × 7.9 × 7.9 in, about 14 litres. It's the exact under-seat bag limit on Cebu Pacific (personal item) and World2fly (personal item).

A bag "fits" here when it has at least 1 cm (0.4 in) to spare on every side, turned whichever way works. 1 of the bags we track do; another 1 are within a centimeter.

Bags that fit 35 × 20 × 20 cm

Personal-item bag (1)

CabinZero Classic Flight Backpack 12L

Personal-item bag · 34 × 19 × 15 cm (13.4 × 7.5 × 5.9 in)

Fits 1 cm (0.4 in) to spare on the length

See it at CabinZero ↗

Other common sizes

• 55 × 40 × 20 cm
• 45 × 36 × 20 cm
• 22 × 14 × 9 in
• 56 × 45 × 25 cm
• 40 × 30 × 20 cm
• 18 × 14 × 8 in
• 40 × 20 × 25 cm
• 40 × 30 × 15 cm
• 50 × 40 × 20 cm
• 55 × 35 × 25 cm
• 56 × 36 × 23 cm
• 17 × 13 × 9 in
• 16 × 12 × 6 in
• 17 × 10 × 9 in
• 55 × 40 × 23 cm
• 40 × 30 × 25 cm

Airline limits checked 5 October 2026; bag sizes are each brand's published dimensions. Airline staff have the final say at the gate.