This is a vintage flannel costume of Jerry the Mouse from Tom & Jerry cartoons.  This has been recently washed.  It has seen some good use.  There isn't a mask with it.  It is open up the back and ties at the back of the neck. Small area under the tail where the seam has had stress. See last photo. 

Smoke free home

Measurements are:

15" Armpit to armpit

12" shoulder to shoulder

shoulder to crotch 22"

inseam 16"