I was hesitant on purchasing the tt writer after reading the other reviews. One said it was made for
big thumbs. Probably so if you're a kid with undeveloped thumbs. I have small thumbs and it fits
like it was made for my thumb. One says the lead is too far down. That scared me too. I find it to
be in just the right place for secret writing! I purchased the under nail writer first and couldnt
get it to stay under my nail while writing. So im very pleased with the vernet thumb tip version.