KVP EZ Soft Pet Cloth Recovery Collar, S Size Fits 5.5" to 12.25" Neck/5.5" Depth

which size would you buy for a 10 lb cat?

For my cat with an 8-9in neck, I was going to order xtra small, but will the opening be too small for her head? How wide will the neck open?

Ok my cat has scratched off a healing scab high on her neck (between neck and ear). she gets it with her back leg . will this stop her?

what size do i get for a 12 pound papillon?