Your fit result

Does Knack Bags Series 2 Small Expandable Backpack fit United Airlines?

This page compares the bag dimensions we have against one published airline rule, renders the fit to scale, and keeps the caveats visible.

Personal item

Knack Bags Series 2 Small Expandable Backpack

Does not fit

Knack Bags Series 2 Small Expandable Backpack is larger than the published personal-item dimensions. Pick a smaller alternative for this airline rule.

Visual sizer

Bag vs airline rule

Does not fit

Does not fit. Largest overage: 2.5 in.

Height

Exact limit

Bag 17 in / Rule 17 in

Width

Over by 2.5 in

Bag 12.5 in / Rule 10 in

Depth

Spare room +4 in

Bag 5 in / Rule 9 in

warning: This result uses medium-confidence source data.
info: Basic Economy generally limited to personal item on many domestic routes

Bag: 17 x 12.5 x 5 in
Rule: 17 x 10 x 9 in
Risk: 92/100
Confidence: medium

Margins: length 0 in, width -2.5 in, depth 4 in.

Main issue: width by 2.5 in.

Bag data

Audited dimensions

Last reviewed: 2026-05-29
Dimension confidence: high
Primary source: manufacturer

Airline rule data

Source-linked rule

Last reviewed: 2026-05-28
Rule confidence: medium
Airline rule: Airline baggage page

View bag details View airline rules Suggest correction

Better-fitting alternatives

Personal item

Alpaka Metro Backpack

Fits

Alpaka Metro Backpack fits the published personal-item dimensions for this rule. Still measure the packed bag, including handles and wheels.

Bag: 16.5 x 9.8 x 6.1 in
Rule: 17 x 10 x 9 in
Risk: 8/100
Confidence: medium

Margins: length 0.5 in, width 0.2 in, depth 2.9 in.

Bag details

Personal item

Matador ReFraction Packable Backpack

Fits

Matador ReFraction Packable Backpack fits the published personal-item dimensions for this rule. Still measure the packed bag, including handles and wheels.

Bag: 17 x 10 x 7.5 in
Rule: 17 x 10 x 9 in
Risk: 8/100
Confidence: medium

Margins: length 0 in, width 0 in, depth 1.5 in.

Bag details

Personal item

Dagne Dover Landon Carryall Medium

Fits

Dagne Dover Landon Carryall Medium fits the published personal-item dimensions for this rule. Still measure the packed bag, including handles and wheels.

Bag: 14.5 x 7.5 x 9 in
Rule: 17 x 10 x 9 in
Risk: 8/100
Confidence: medium

Margins: length 2.5 in, width 2.5 in, depth 0 in.

Bag details