I'll update my review if it doesn't. Have to figure it out but I do like it a lot. This was caused by inconsistent movement of head and release placement. I would describe it as medium sized. The inside of the case itself measures about 4. He said it fit perfect and he is out target shooting every evening. A bit softer than others I have tried and easily installed.
Before I bought button, I thought my string placement at nose was consistent. Make sure the black part is at the 6 o'clock position. My kisser button did exactly what I expected. Works well and produces consistent readings for me. You never have to worry about the arrow falling off the rest EVER! Had mine adjusted and tied in by my archery shop and works fine. I take the measurement several times and get a pretty good average weight.