The max size for text in signatures when using the size tag is 3.75, so actually 3 since you can't do decimals. However, the normal text in a signature out of the size tag is far bigger than 3.75. I think the max size should be the same as normal text out of size tags, so I can have text slightly bigger than normal text but not microscopic. It's a small detail sure but, it'd be nice if it was fixed and I don't imagine it'd be really hard.. but what do I know