I regularly use a Saunders 11x14 four bladed easel and print with a 1/4 inch border.

For small prints (4x5 or 4x6) I have a Beseler borderless easel. This one has two "bars" that are adjustable and I make these to be about 1/16th inch or 1mm smaller than the long dimension of the paper. this holds the paper flat and gives a borderless print.