Your fit result

Does Knack Bags Series 2 Medium Expandable Backpack fit Lufthansa?

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 Medium Expandable Backpack

Does not fit

Knack Bags Series 2 Medium 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: 3.3 in.

Height

Over by 3.3 in

Bag 19 in / Rule 15.7 in

Width

Over by 0.2 in

Bag 12 in / Rule 11.8 in

Depth

Spare room +1.4 in

Bag 4.5 in / Rule 5.9 in

info: Aircraft type or national authority safety requirements may impose further restrictions.

Bag: 19 x 12 x 4.5 in
Rule: 15.7 x 11.8 x 5.9 in
Risk: 92/100
Confidence: high

Margins: length -3.3 in, width -0.2 in, depth 1.4 in.

Main issue: length by 3.3 in, width by 0.2 in.

Bag data

Audited dimensions

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

Airline rule data

Airline-published rule

Last reviewed: 2026-06-15
Rule confidence: high
Airline rule: Airline baggage page

View bag details View airline rules Suggest correction

Better-fitting alternatives

Personal item

Rick Steves Civita Day Pack

Fits

Rick Steves Civita Day Pack fits the published personal-item dimensions for this rule. Still measure the packed bag, including handles and wheels.

Bag: 14 x 11 x 5.5 in
Rule: 15.7 x 11.8 x 5.9 in
Risk: 8/100
Confidence: high

Margins: length 1.7 in, width 0.8 in, depth 0.4 in.

Bag details

Personal item

CALPAK Luka 15 inch Laptop Backpack

Risky

CALPAK Luka 15 inch Laptop Backpack is over the published personal-item dimensions, but the soft construction may make it a borderline option if lightly packed. Treat this as a fee-risk result.

Bag: 16 x 12 x 7 in
Rule: 15.7 x 11.8 x 5.9 in
Risk: 55/100
Confidence: high

Margins: length -0.3 in, width -0.2 in, depth -1.1 in.

Main issue: length by 0.3 in, width by 0.2 in, depth by 1.1 in.

Bag details

Personal item

Monos Metro Backpack

Risky

Monos Metro Backpack is over the published personal-item dimensions, but the soft construction may make it a borderline option if lightly packed. Treat this as a fee-risk result.

Bag: 16.5 x 11.5 x 6 in
Rule: 15.7 x 11.8 x 5.9 in
Risk: 48/100
Confidence: high

Margins: length -0.8 in, width 0.3 in, depth -0.1 in.

Main issue: length by 0.8 in, depth by 0.1 in.

Bag details