Picture Frames in the following sizes (all in inches):
11 x 9 (maybe 10 x 8 internal) - 1 in no;
17 x 11 - 2 in no;
17 x 13 - 1 in no;
20 x 14 - 2 in no;
24 x 20 - 1 in no.
Have as many, or as few, as you want!