Tips on size of o-rings for hilt (or anything else)

Going to be putting 3 o-rings on an 89Annulus hilt over those 3 engraved bottom rings already on it.

It’s getting a wrap put on by someone else right now, so I can’t measure it to see what size I’ll need. I want to put some o-rings on it like the ones on the Darth Maul OG, so does anyone have any idea what size those are around approximately?

Saw these really nice “golden rope” colored & shaped o-rings I think might look nice.

And please, feel free to give me any tips or recommendations on this one, because I plan on just throwing everything I got into this one visually!

if you want good audio you could get a smugglers outpost speaker (on Etsy)

I already have the build installed, & it has a KR 25mm Speaker.

I’m just working on the visuals of the hilt now.

Smugglers Outpost does have some great prices though.

You could get a big pack of different sized O-rings on Amazon

ah ok nice.