Handbag Sizes Explained: How to Read W × H × D

Short answer: Width is measured across the widest point of the base, height from base to the top of the body, and depth front to back. Width decides what lies flat, height decides what stands up, and depth decides how much the bag bulges. Of the three, width and depth matter most for day-to-day usability.

Most people read only the first number and then wonder why a "25cm bag" felt nothing like the last one. The other two dimensions are usually the explanation.

The three numbers, one at a time

Width (W) — the headline number

Measured across the base at its widest point. This is the number most brands quote and the one that maps most directly to use:

• Under 20cm: evening and event bags
• 25cm: everyday bags — the Jelkin 25 Cloud and Jelkin 25 Cloud sit here
• 30–35cm: work and study bags
• 40cm+: totes and carry-everything bags

Height (H) — what stands up

Measured from the base to the top of the bag body (excluding handles or straps). Height decides whether a bottle or a book can stand upright, which is often the difference between organised and chaotic.

Depth (D) — the forgotten number

Measured front to back at the base. Depth is why two bags with identical width and height can feel completely different. A shallow bag feels sleek but fills fast; a deeper bag swallows more without looking bigger.

Why soft bags break the rules (in a good way)

Measurements assume a fixed shape. A padded bag does not have one — the sides flex outward, so the usable space exceeds the stated width. This is the single most important caveat: a soft 25cm bag carries more than a rigid 25cm bag.

How to translate dimensions into real items

Item	Needs roughly	Fits in 25cm?
Phone (any size)	15cm tall	Yes
Full wallet	19 × 10cm	Yes
Sunglasses in soft sleeve	16cm long	Yes
Slim 500ml bottle	22cm tall	Yes, upright
Small tablet	20cm+ tall	Sometimes
A4 folder	30cm tall	No
13-inch laptop	30cm+ wide	No

Measuring a bag you already own

1. Empty the bag and stand it upright on a flat surface
2. Measure the base at its widest point — that is width
3. Measure from the base to the top edge of the body — height (not including straps)
4. Measure the base front to back — depth
5. Compare against the table above before buying the next size up

Frequently asked questions

What does 25cm mean on a bag?

The width across the base. It is the standard everyday size — enough for essentials, small enough to stay light.

Which dimension matters most?

Width for what lies flat, depth for how much fits. Height matters mainly if you carry upright items like bottles.

Do handles count in height?

No. Bag height excludes handles and straps; strap drop is measured separately.

Why do two 25cm bags feel different?

Depth and construction. A deeper or softer bag holds noticeably more at the same width.

Is bigger always better?

No. Oversized bags encourage carrying things you do not use, and the extra weight is what makes people stop using a bag.

Check it against the others: the airline personal item size checker puts this allowance next to 18 other carriers and tells you whether a 25 × 17 × 14 cm bag passes.

Same region, different rule

• Lufthansa personal item size
• Swiss personal item size
• Eurowings personal item size

Not sure how these allowances are written in the first place? The rules explained covers why the same bag is free on one carrier and a paid extra on another. The bag measured throughout this page is the Jelkin 25, 25 × 17 × 14 cm on the outside.