While "thumbs" specifically are not usually singled out, general hand characteristics often discussed include:

The phrase "young ladyboys thumbs" is not a standard anatomical or cultural feature commonly documented in mainstream literature or research.

: Many ladyboys are noted for having longer fingers, though they may have smooth knuckles similar to those of biological women .

However, in the context of identifying (kathoey) in Thailand, physical traits like hand size and finger length are often cited as distinctive features . Observed Physical Features