When they first got engaged (since it happened during a war they didn't have rings at first, they had twine wrapped around there fingers instead

(this was not by me originally it was a headcannon by @Awkwarddesigns_13 on tiktok. go check her out she does really cool cosplay)

(this is by me)

when they all got rings they each got 2 for each person that were identical (like Sapnap has two different ones, one for Karl and one for Quackity but Sapnap and Quackity have the same one for Karl if that makes sense)