We have a lot of 7 buckles which are vintage and antique.  The top left and 2nd row right are the same size about 1 1/4" x 1".  Ibe if tgen us dated Jan 27 1914.  The top right has decorative edges around the outside. It measures about 1 5/8 square. It is in nice condition with no flaws noted.

The center one on the left is about 1 1/8" x 7/8" a bit tarnished but good condition.

The third one down on the lft is about 3/4" x 3/8" and the bottom one is about 1" x 5/8".  The small round one is about 5/8" across the center.  They all have different degrees of tarnish and the second one down from the top right has a touch of rust.

7 Buckles Metal Vintage