Crossplaying as a younger/smaller version of a character?
The trouble I have with crossplay is my age/size --I have successfully passed in multiple situations, but do you think I will ever get out of the fact that I really can only pass as a 12 year old boy? I am 5'6'', which is not exactly short, but I am small (110 lbs) and have very little chest/rear. Though I'm 20, I do really well at Sora, and most of the time that is when I pass. The other time someone thought I was actually a guy when I was cosplaying Loki, but in all honesty, I looked like a teenage version of him, rather than his proper age. Same with Snape -- there is no way I look the proper age for Snape.
I suppose what I'm asking is 1) does anybody have any ideas/advice on looking older for certain characters, 2) does anyone else have this problem, or 3) if it is advisable to just go as kid Loki, kid Snape etc?
Occupation: Consulting Detective
Rank: Jedi Master
Race: Time Lord
Health Status: Immune