We have a pair of Infant Shoes with a cut steel buckle, Vintage Items.  I think they may be leather - the leather is in very rough condition being discolored.  They have ties in the center front with the cut steel metal faux buckles on the top of the toe portion.  The shoes measure about 3 3/8" in L on the sole x about 1 5/8" across the widest part of the foot.  The tiny steel faux buckles measure about 5/8" x 1/2".   They are in fair to poor condition, they could be reconditioned.

Infant shoes with Cut Steel Buckle Vintage