If you don't know already, Chara is known to be the shorty of the group but the shortest would have to Reuben since he is younger but I always had a headcannon where in the future Reuben grows taller than Chara and she is forever short.

15 year old Reuben
19 year old Chara

Chara: I'm so glad I'm not the shortest.

Reuben: I hate being short.

16 year old Reuben
20 year old Chara

Chara: H-How did h-he grow that t-tall O-O

Reuben: Ha ha, I'm at Chara's height now! 😄

18 year old Reuben
22 year old Chara

Chara: Nice try Reub but you'll always be short.

Reuben: Dang it. 😑

20 year old Reuben
24 year old Chara

Reuben: So what did you say about being short forever.

Chara: Gosh dang it.

I enjoyed doing this and I'm sorry for so updates guys, PEACE OUT!!!!!

Also, the grown up Reuben clothes are _Dj_Wolf_Minecraft_ , Go check her out.