Can someone also make silvers tiles 45x45 instead of 44x44?
Oooh, I wouldn't recommend it. That'll cause trouble down the line with animation and stuff. Two useful guidelines are
1: Design tiles with an even dimension of pixels, and
2: design dungeons with an odd dimension of tiles.
Out of curiosity though, why do you need to resize the old tileset?
EDIT:Oh wait, do you mean the wall tile I just posted? I thought Hammy's were 44x44?