Here is a link to a post from a while back with a picture of the pan I use.
I use the largest piddle pad and it fits just fine.
BTW my Yorkie Jazzie is a 10+ pound full figured gal and she has plenty of room to "find" the perfect spot.
She's fussy and will "roll up" the pad after use. I just spin it 90 degrees and she's ok with it. - If only I can understand how she thinks! LOL!
http://www.yorkietalk.com/forums/my-...d-roll-up.html