A:
Kathy-
It is 12-1/2" tall X 21-7/8" wide X 15-5/8" deep (front to back). [decimals = 12.5 x 21.875 x 15.625].
Note: It has a right angle plug ("L" shaped), which allows you to push it closer to the back wall. We have ours' pushed up snug to the plug and that results in the front of the micro being 17-3/4" to the back wall. So figure the actual front to back distance at: 17-3/4", unless of course, your electrical outlet is to the side of the oven and not directly behind it like ours', then you will be able to push the oven up tight to the wall.