10mg is a tiny amount, virtually all of the pill is binders/fillers. think about a pill containing 25mcg of a substance - thats 25 MILLIONTHS of a gram, i doubt it would visible to the naked eye if it didnt have any binders or fillers.
1 gram is defined as 1 cubic centimeter of distilled water at 4 degrees celcius at sea level pressure. 10 mg of water is 10 cubic millimeters. a tiny amount. although oxandrolone obviously is a different density than water (less dense) it would still take up a very small volume.
a quick example:
i measured a 5 mg pink thai, thickeness is 3 millimeters, side is 4 millimeters. without going into a dissertation about finding area/volume of a regular pentagon i determined the volume to be 90 cubic millimeters. thats a lot considering how small they are!! even if the density was 1/2 that of water that would mean that only 10 cubic millimeters was the actual substance, leaving 80 as filler. if the density were 1/4 that of water that still leaves 70 cubic millimeters as filler.
summary dont worry if a pill is tiny, the chemical u seek takes up less physical space than you think!