I bought adjustable ankle weights with 1/4 lb bars. you can load them to be 1/4lb all the way up to 2.5lbs.
I went to a hardware store and bought some of the largest washers they had (these were for standard one inch bars). I took them home and weighed each one on a digital scale and mixed and matched them until I had two sets of three that weighed 10 oz (.625 lb) each, since they had slight variations in weight, then taped the sets of three together on the edge with duck tape.
I bought adjustable ankle weights with 1/4 lb bars. you can load them to be 1/4lb all the way up to 2.5lbs.