Size guide

Find the perfect fit

Grab a soft tape measure (and a few treats), then compare with the charts below.

How to measure

Three quick measurements

Between two sizes? Always pick the larger one.

Measure around the base of the neck, where a collar sits. Keep two fingers under the tape so it isn’t tight.

Measure around the widest part of the chest, just behind the front legs.

Measure along the back, from the base of the neck to the base of the tail.

Alien Astronaut

Size	Neck	Head	Back length
S	23–27 cm9–10.6 in	20–26 cm7.9–10.2 in	25 cm9.8 in
M	26–30 cm10.2–11.8 in	20–26 cm7.9–10.2 in	27 cm10.6 in
L	33–38 cm13–15 in	35–41 cm13.8–16.1 in	35 cm13.8 in
XL	40–46 cm15.7–18.1 in	35–41 cm13.8–16.1 in	37 cm14.6 in

The alien hood goes over the head, so check the head measurement too. Between two sizes? Pick the larger one.

Snip Snip

Size	Back length	Neck (adjustable)	Chest (adjustable)
S	25 cm9.8 in	25–80 cm9.8–31.5 in	26–80 cm10.2–31.5 in
M	30 cm11.8 in	30–80 cm11.8–31.5 in	28–80 cm11–31.5 in
L	35 cm13.8 in	40–100 cm15.7–39.4 in	38–100 cm15–39.4 in
XL	45 cm17.7 in	45–105 cm17.7–41.3 in	30–105 cm11.8–41.3 in

The neck and chest straps fit a wide range, so choose by back length: from the base of the neck to the base of the tail.

Headless Vampire

Size	Neck	Chest	Back length
S	25 cm9.8 in	40 cm15.7 in	18 cm7.1 in
M	27 cm10.6 in	42 cm16.5 in	20.5 cm8.1 in
L	35 cm13.8 in	50 cm19.7 in	23 cm9.1 in
XL	40 cm15.7 in	56 cm22 in	30 cm11.8 in

Best for cats and small dogs. Neck is the most important measurement. Between two sizes? Pick the larger one.