So, I made a reference sheet of Frisk that was ripped off inspired from @nochocolate‘s Chara reference sheet. I hope they’re alright with me using their format/layout.
The drawings/sepia sprites used were all created by Temmie Chang, so I consider hem to be reliable sources for Frisk’s design.
NOTES
Frisk has medium-length hair that stops just above their shoulder.
While not present in the overworld sprites or figurine, Temmie has often illustrated Frisk with side-swept bangs.
They wear a crew neck shirt with long sleeves.
In some of the artwork, a black ring (possibly an undershirt?) can be seen near/under their shirt collar.
In most cases, the two stripes on their shirt only goes around the torso, not the arms. However, in the sprite of them hugging Asriel, stripes on their arms can be seen, but this has been their only appearance.
In some of the artwork, a dark ring (possibly an undershirt?) can be seen near/over their shirt collar.
Their cheeks are not as round as Chara’s.
Frisk’s bottom wear is very inconsistent. Based on the overworld sprites, it consists of shorts/pants with shoes/boots/leggings(?). The figurine has shorts and dark leggings, while some of Temmie’s art shows the same as the figurine, but sometimes gives them long pants with dark shoes as well.
They are presumably the same height as Chara.
Frisk’s hair and shoes/boots/leggings are the same color.
The blue on their shirt and the color of their shorts are the same shade of blue.
Frisk’s eye color is unknown, however some theorize that it is red. When Chara possesses them in the soulless pacifist ending, their eyes turn red when opened, despite that Chara’s eyes have not been red in any other appearance.
AngelMihe 