I have four I think. I have two that are just for play, one that was my first official collar, and a steel collar that I wear all the time.

Three that fit and one that's way too small and will probably be a gift to my next pet cat.
I have a plain black nylon dog collar, a studded leather dog collar, the "Black Cat" collar by Aslan, and the Diva Stars one in black (the one that's going on my future cat xD ).

I love the Black Cat one but it's too....obvious to walk around in public with, but the nylon one I got is actually remarkably soft and comfy, perfect for casual wear since it's rather discreet.
It's even still in great shape four years or so after I bought it. c:

I don't have any but am looking into getting one for my partner. Not sure what to pick out, though.

I have two. One that's pretty tight and one that's more comfortable. And I'm getting a new one soon that's an eternity collar that I will be able to wear all the time. I'm so excited!

I don't have one yet.

My collection is starting with 0 too. But I would love to have at least 2.

i only have to right now but more soon