Pet Crate Selector
Get a recommended crate size from your pet body length, standing height and shoulder width
Pet Crate Selector
Enter your pet measurements for an instant size estimate. This is a space estimate only and does not replace the latest rules of the carrier.
Results update as you type. All sizes are inner dimensions in centimetres.
How the numbers are calculated
Inner length = body length + 10 cmInner width = max(shoulder width × 2, body length × 0.6)Inner height = standing height + 5 cm
Each of the three values is rounded up to the next whole centimetre.
Why double the shoulder width? A pet needs room to turn around inside the crate. Twice the shoulder width leaves space on both sides, while the body-length term stops long, narrow pets from getting a crate that is too tight.
Why add 5 cm of height? Standing height is measured with the head up. The extra 5 cm lets the pet stand without the head touching the roof and leaves room for a bed or absorbent pad.
Common crate sizes
| Size | Inner dimensions (cm) | Typical weight | Typical use | Watch out |
|---|---|---|---|---|
| S | 50 × 34 × 30 | ≤ 5 kg | Puppies, kittens, vet visits | Short trips only; quickly outgrown |
| M | 58 × 40 × 38 | ≤ 8 kg | Small and medium dogs or cats | Common starting size; add padding for long trips |
| L | 68 × 48 × 45 | ≤ 12 kg | Medium dogs, multi-cat trips | Must allow standing and turning |
| XL | 81 × 58 × 56 | ≤ 20 kg | Large dogs by air | Check carrier size caps |
| XXL | 91 × 64 × 66 | ≤ 30 kg | Giant breeds, cargo | Most cabins do not accept it; cargo only |
Typical weights are rule-of-thumb values. The measured inner sizes take priority.
Requirements by travel type
| Travel type | Crate | Ventilation | Securing | Common limits |
|---|---|---|---|---|
| Domestic flight | Hard-sided crate (no soft bag) | Ventilation on four sides | Door lock plus belt or bolt fixing | Many airlines restrict brachycephalic breeds in the hold |
| International flight | Rigid crate following IATA space principles | Ventilation on three sides with metal grille | Metal door lock and bolt fixings | Health certificate and quarantine documents required |
| High-speed rail | Hard crate or a dedicated soft carrier | Good airflow; no fully closed bags | Crate secured so it cannot slide | Size and weight limits vary by route |
| Road trip | Hard crate preferred | Keep air circulating; never cover the vents | Seat belt or boot divider net | Keep away from the passenger airbag zone |
Five common mistakes
- Buying one size down：A crate that is too small stops your pet from standing and turning, and raises stress.
- Looking only at weight：Body length and standing height often decide the size; a heavy but short pet may need a smaller crate.
- Taking a soft bag on a plane：Most airlines require a rigid crate for checked pets; soft bags suit cabin or car use only.
- Too few ventilation holes：Ventilation on several sides keeps air moving, especially on hot days.
- No fixing strap：In a car or during handling, an unsecured crate slides and can injure the pet.
This page gives a space estimate only. Always check the latest size, weight and document requirements of your carrier before travelling.