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JetBlue Personal Item Size (2026)

JetBlue personal item size under the seat, how it pairs with the free carry-on, and notes on Main Base (formerly Blue Basic). Official sources linked.

Quick answer

JetBlue’s personal item is 17 × 13 × 8 in (43.2 × 33 × 20.32 cm) and must fit under the seat. It is free with 1 carry-on on every fare including Main Base (formerly Blue Basic). Official examples: purse, small backpack, briefcase, laptop; a pet carrier counts as the personal item. It is not the same as the free carry-on limit of 22 × 14 × 9 in.

Last verified:

Official sources:

How we check: We only publish what these official pages say. See How we verify fees.

This page follows JetBlue’s official carry-on bags help, bag calculator, and Our Fares (and its flights terms). JetBlue does publish an explicit personal-item length, width and height, which is clearer than airlines that only say “under the seat.” Check jetblue.com again before travel.

Table

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Field JetBlue published value
Max dimensions (in) 17 × 13 × 8 in (official published L×W×H)
Max dimensions (cm) 43.2 × 33 × 20.32 cm (JetBlue’s published metric size)
Placement Under the seat (not overhead)
Cost Free on all fares (including Main Base), plus a free carry-on
Weight None published for personal item
If oversized May not qualify as personal item; could count as your carry-on or need to check. JetBlue does not publish a gate fee
Carry-on contrast 22 × 14 × 9 in (55.88 × 35.56 × 22.86 cm); free on all fares; no weight limit if you can lift it; see carry-on size; the calculator’s width typo of 15.56 should read 35.56 until JetBlue fixes the calculator
Allowed examples Purse, small backpack, briefcase, laptop; a pet carrier counts as the personal item
Main Base interaction On Main Base, the personal item and carry-on are both free (a key difference from United Basic Economy; Blue Basic is the former name)
Sizer and enforcement Under-seat fit; overhead space for carry-ons is space permitting, so a gate check is possible if bins are full
Contrast: United, Frontier and American United 9 × 10 × 17 in; Frontier and American often 18 × 14 × 8 in

Free and paid

Personal item: always free if it meets 17 × 13 × 8 in (43.2 × 33 × 20.32 cm) and fits under the seat.

Full carry-on: also free on all fares including Main Base (22 × 14 × 9 in). (Blue Basic is the former name of today’s Main Base.)*

Checked bags: paid unless a Mosaic, card, military or Mint waiver applies. Prepaid off-peak prices are $45 for the 1st bag and $59 for the 2nd when added more than 24 hours before departure, with higher amounts within 24 hours of departure and on peak dates; the full table is on JetBlue baggage fees.

Unlike United Basic Economy on most domestic routes, JetBlue Main Base keeps both the free personal item and the free overhead carry-on.

Gotchas

  • JetBlue publishes sizes, so other JetBlue personal-item inches quoted on blogs are wrong; use 17 × 13 × 8.
  • Soft bags that don’t fit under the seat may be refused as a personal item.
  • Pet carrier counts as the personal item (not a free extra).
  • United’s $75 gate fee for a failed personal item is not a JetBlue rule; JetBlue does not publish that fee.
  • The carry-on size (22 × 14 × 9) is not the personal-item limit.
  • The Bag Calculator’s carry-on cm typo (15.56 instead of 35.56) does not change the personal item size of 43.2 × 33 × 20.32, but double-check calculator figures in general.
  • A previous JetBlue Blue Basic page could not be opened, so treat the rename history as unofficial unless JetBlue republishes it.

Avoid fees

  1. Choose a bag of 17 × 13 × 8 in or smaller when packed; measure packed, not empty marketing size.
  2. The free carry-on (still free on Main Base) is there when you need more space.
  3. For checked fees, see our baggage fees page.
  4. If you must check a bag, prepay more than 24 hours before departure; see the fees page.

Bags that fit

Suggestions for bags that fit under the seat as a JetBlue personal item. Prefer non-expanding backpacks and totes marketed at or under 17 × 13 × 8 in. Measure when packed.

When shopping, filter for bags of 17×13×8 in or smaller and measure them yourself.

FAQ

What is JetBlue’s personal item size?

17 × 13 × 8 inches (43.2 × 33 × 20.32 cm), under the seat, free on all fares. Soft bags should stay within that box when packed.

Is a personal item free on JetBlue Main Base (Blue Basic)?

Yes. Main Base includes one free personal item and one free carry-on (unlike United Basic Economy on most routes). Main Base is the current fare name.

What if my personal item doesn’t fit under the JetBlue seat?

It may not count as a personal item and could need to go in the overhead (as your carry-on) or be checked. JetBlue does not publish a $75 personal-item gate fee like United’s.

Does JetBlue allow a backpack as a personal item?

Yes if it is a small backpack that fits 17 × 13 × 8 or smaller and goes under the seat when packed.

What’s the difference between JetBlue personal item and carry-on?

Personal: 17 × 13 × 8 in, under seat, free. Carry-on: 22 × 14 × 9 in (55.88 × 35.56 × 22.86 cm), overhead, also free on all fares including Main Base. Full carry-on detail: JetBlue carry-on size.

How does JetBlue’s personal item compare to United, Frontier, or Delta?

JetBlue publishes 17 × 13 × 8; United 9 × 10 × 17; Frontier and American often 18 × 14 × 8. Delta and Alaska: under seat only, no published length, width and height. See our pages for those airlines.

Related

Disclaimer

Confirm sizes and fees on jetblue.com before travel. BagRule is not affiliated with JetBlue Airways.