The 3-1-1 liquids check: do they fit a 25 × 17 × 14 cm bag?

Short answer: the TSA 3-1-1 rule allows containers of 100 ml (3.4 oz) or less, all in one quart-sized bag, one per passenger. A quart bag lies flat at about 15 × 20 cm. The Jelkin 25's 25 × 17 cm interior holds that quart bag flat with room beside it for the rest of the essentials — so yes, your 3-1-1 liquids fit, and so does everything else.

The rule, stated plainly

3-1-1 means: containers 3.4 oz / 100 ml or smaller, in 1 quart-sized clear bag, 1 bag per person. The quart bag is the constraint, not the bottle count.

Limit	Value
Per-container max	100 ml / 3.4 oz
Container bag	1 quart (~15 × 20 cm flat)
Bags per passenger	1
Jelkin 25 interior	25 × 17 cm — holds the quart bag flat

Why this bag is a good liquids bag

The quart bag is floppy, so it conforms to the bag's interior instead of fighting it. A rigid toiletry case of the same volume would be awkward; the quart bag is not. With the liquids flat against one wall, the phone, wallet, iPad mini and chargers sit beside them without pressure on the zip.

The depth check still applies

A quart bag of bottles is thin, so it adds little depth — well within the 14 cm. The liquids rule and the sizer rule both pass. Just do not "help" by standing bottles upright; lay them flat and the bag stays shallow and compliant.

Should you buy the Jelkin 25 for this?

A quart bag lies flat at about 15 × 20 cm and the interior here is 25 × 17 cm, so liquids go flat against one wall with the rest of the essentials beside them and no pressure on the zip. If you have been fighting a rigid toiletry case into a small bag, this is the shape that stops the fight. Lay the bottles flat — standing them up is what adds depth.

How to check this yourself before you fly

1. Use a soft quart bag, not a rigid case. It conforms to the interior instead of fighting it.
2. Keep containers at 100 ml / 3.4 oz or under. That is the rule, not a suggestion.
3. Lay bottles flat against one wall. Standing them upright is what pushes depth toward 15 cm.
4. Re-measure depth with liquids in. A flat quart bag adds very little — a standing one adds enough to matter.

Keep reading:

• airline personal item size checker — all 19 carriers side by side
• one-centimetre depth cliff — why 15 cm decides six airlines
• the 25 cm bag that fits every sizer — length-vs-depth end to end
• why external dimensions lie about capacity — how we measure bags
• Jelkin 25 — the 25 × 17 × 14 cm bag measured on this page