Hello Debbie, Yes YES yes................. so long as tile is Smooth.
The old tile is 4 inch white squares
How well is the old tile sticking? You new tile will only look good if the old tile is secured well. Is the old tile grouted? Or is it traditional peel and stick too?
Ok. So this is trickier. There will be grooves where the grout is. If you’re peel and stick tile is not rigid enough these will show through over time.
Hello again, You can get smaller stick on tiles, but if not either cut down the tiles to fit your tiles or use sticky back plastic (Contact) and cut into tiles, you have the grid on the back to help you out! You can always make your own pattern or design............