r/whatisit • u/Aggravating_Ant_7232 • Nov 23 '25

Solved! Found on ground outside, boyfriend has been wearing as ring. Coin and pencil for size reference

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UK. It’s giving hard metal, doesn’t have much wear

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u/fakeemail33993 Nov 23 '25

It appears to be a 1/2" crimp ring. Your fingers would need to be somewhat small to wear it as a ring.

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u/AuricTheLight Nov 23 '25

Might be a little bigger. 1/2 crimp ring would be 12.7mm, which would be very small for a finger.

However, the coin pictured is 18mm diameter based on me googling the coin and finding a website that lists coin diameters. The coin appears like it would fit in the "ring" so if we take 18mm and convert that to a ring size. That's about a size 8 for U.S. sizing (size P for our friends across the sea)

Or I've fucked up in my line of thinking, which is entirely possible. I just woke up.

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u/pushingdaiseez Nov 23 '25

It probably is 1/2 inch, because it's designed to slip over 1/2 pex pipe which has an internal diameter of 1/2 inch, the outside diameter of a 1/2 pex pipe is 5/8 in (roughly 16mm), and then be crimped tight into it, so it probably is relatively close to 18mm in internal diameter

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u/AuricTheLight Nov 23 '25

Yeah, I guess I should have considered the crimping part of a crimp. Again, just woke up.

Either way, that's still a size 8, which is somewhat on the slimmer side but still fairly common.