Actually, I didn't look at that individual thumb you provided the unlinked link to. But now that I see it, it does appear young, however it could just be the size of the thumb.
A friend of mine had a site she put up when she asked me for advice about it, I had to recommend that she remove two of the thumbs because the girls in it looked around 8 to 10 years old, but in actuality one model was 19 and one model was 26! They were just petite and small breasted, but her thumbs made them look very young. So she removed those, but legal aged girls can look extremely young in certain pictures.
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