I do a very quick measurement locking the dial indicator down on the size of the first one then using it as a gauge to make sure no different sized ones slipped through. I measure height and diameter this way, only takes a few minutes to check all of them. Then most importantly I weigh them. The last box had nine very very light tips, then two groups that each had a bunch of tips that weighed basically the same thing. A fourth group which had only four tips in it was very heavy. I wanted to keep them to play with myself and see how they played and held up but unfortunately they were lost when my shop was in a storm. Dudded or not, I found that the thirty-seven tips in the two medium weight groups played very well. I just used a cheap under twenty dollar digital scale from harbor fright to weigh them, worked just fine. I don't remember the weights and don't believe the actual weight matters, it is obvious that these very consistently weighted groups should be from good leather.
Forgot to mention, Elkmaster now offers selected tips themselves, Elkmaster Pro's for a few dollars each. I suspect they select much like I do.
Hu