one of my lils is a year and 2 weeks older than me. my other lil is about 4 months younger... it balances out in the end because they are both about a foot taller than me. Like the person above said... I am the Lil Big sis. I think the biggest gap between lil and big is the big sis is 21 and the lil is 25. The 21 year old's second lil sis is now 20.
It's actually kinda fun having an older lil... you can give them tips on the sorority and they can give you tips on how to live life.