from a professional dog bed producer a suitable donut bed is very import for u dog or cat .
as we know the donut bed material is long plush and PP filing . the plush about 5CM, normal calming bed fit for cat size 40cm, 50cm ,60cm ,
for dog from 60cm , 70cm , 80cm , 90cm , 100cm , 110cm , 120cm .
60cm fit for 9KG dog , 70cm fit for 18kg dot , 80cm fit for 25kg ,
the size more big fit for more biger size dog .
if u want to know which size better fit for u dog ,pls leave message , then i will recommended that you measure the size of your pet before buying.
https://www.ochopet.com/product/en/Warming-Cozy-Soft-Dog-Round-Bed.html