We have 2 small Brass Buckles, vintage items.  They are not a set.  In the first photo from top to bottom - there is a rectangular buckle measuring about 3/4" x 1/2".  The lower buckle has a rounded outside edge.  This one measures about 7/8" x 3/4".  They both show some wear - please refer to photo's. 

2 Brass Buckles Small, Vintage