What size collar does my dog need?

Measure the neck at the base, keep the tape snug against the coat, then add two fingers of room. Choose the size whose range contains that number rather than the size that matches the breed.

How much room should be left under the collar?

Two fingers should slide under the band without forcing. Tighter leaves a mark; looser will ride forward onto the throat when your pet lowers its head.

Can I use the same measurement for a cat?

The measuring method is identical, but the collar choice is not. A cat should wear a breakaway collar as their everyday collar, so a crystal collar is a supervised, occasion-only piece.

My puppy is between two sizes. Which should I buy?

Take the smaller size and re-order as the dog grows. A collar that is too big is a safety problem rather than a growth investment, and every size is adjustable within its own range.

Dog & Cat Collar Size Guide

A collar that is too loose slides forward onto the throat; one that is too tight leaves a mark. Two minutes with a soft tape removes both problems, and it is the single most useful thing you can do before choosing a stone.

How to measure

Use a soft measuring tape, or a piece of string you measure afterwards.
Measure where the collar actually sits — the base of the neck, not the narrowest part of the throat.
Keep the tape snug against the coat, then add two fingers of room.
Re-measure once a season: coats thicken in winter and puppies change shape in weeks.

The two-finger rule

Two fingers should slide under the band without forcing. If they do not fit, the collar is too tight; if a whole hand fits, it is too loose and will ride forward when the pet lowers its head.

Size chart

Each design is offered in S, M, L and XL, and each size is adjustable within its own range. The exact neck ranges in centimetres and inches are measured on production pieces rather than estimated, so they are published as soon as those measurements exist — and they must match the product pages and the shopping feed exactly.

To confirm before launch

S / M / L / XL neck ranges in cm and inches
Band width and total weight per size
The same values on every product page and in the product feed

Cats and small dogs

Cats are measured the same way, but the safety advice is different. A cat’s everyday collar should be a breakaway type; a crystal collar is not, so treat it as a supervised, occasion-only piece rather than the collar your cat wears to bed. The product safety page sets this out in full.

Before every wear

Fit, beads, band and fastener — four checks, ten seconds. If a bead moves in its setting or the band has softened, take the collar off until it has been looked at.