I know this sounds stupid but how old is Jasper? in human years. like physically? i can't find it anywhere!

if bạn go on to the new moon page then go on to the các bài viết theres one called the medow in edwards perspective. click on there and go to thêm các bài viết bởi brown_x_eyes and on the một giây page theres a full biography for most of the characters, incase bạn need thêm information about any one else.
but this is part of what it saids for jaspar-

Jasper was turned into a vampire in 1863 bởi a vampire named Maria when he was 20 years old.

i havent edited this at all. ive just copied part of it. hope this helps.

he's 20....

check out www.twilightlexicon.com under character bios