Just gravity falls style and we’re meant to interpret them as having 5 fingers, even if they’re shown with 4! In fact, someone who’s worked on gravity falls was asked this exact question and here’s his reply:

Fun outside of the Fearamid

Just a silly little drawing inspired by the triangle guillotine in tBoB #gravityfalls #stanfordpines #billcipher

Stupid nerds (as kids) drawn on magma #billford #gravityfalls

We’re letting Ford and Mabel bond this Thanksgiving ☝️🦃 #stanfordpines #mabelpines #gravityfalls

A very self indulgent human Bill Cipher Design 🔺

Inspired heavily by Ancient Egyptian culture #gravityfalls #billcipher #humanbillcipher

I love my stinky boys #gravityfalls #stanfordpines #fiddleford

What if Ford shot that crossbow? Based off the prompt by Saturns_Kee on twt!

#gravityfalls #stanleypines #stanfordpines #gravityfallsfanart

Take me away Stanford Pines yuri…

Scalene and Euclid being lesbians would’ve saved Bill…methinks #gravityfalls #billcipher

Something something abt before Bill vs after #gravityfalls #stanfordpines