Anyway, what does a wedding ring symbolise?
(Don't just say being married, you might as well get the contract wrapped round your finger if that is it)
It symbolises love, commitment, that person "belonging" to someone, carrying the thought of your partner around at all times. I fiddle with my ring all the time, and it makes me think of how I am always in love and committed to DH, even when we are apart - almost like he is giving me a tiny hug. I love the idea of him wearing his and thinking the same about me. I like the understated nature of it - we don't need to explain ourselves as being committed for life, because we have an accepted symbol of that, and that symbol is with us whatever we do. I like that my rings (I wear my engagement ring and wedding ring together) are pretty and sparkly, because that is my taste, and even if I am covered in poster paint (and the diamonds on my wedding ring are currently under a layer of acrylic from some painting I've been doing) I have that little symbol that somebody values me above all else. My engagement ring is a vintage one that was cheap, because we could only afford £50, and DH and I chose it with great care. My wedding ring used to belong to my Nana, and was given to her by my Grandad and passed on to me by my mum. I feel like my family is blessing our relationship. My rings are the only proper jewellery I own - they are my symbol of growing up, of having my own family and life and of being a mother primarily, rather than being a child.
I know it is possible to feel all that without a ring, and to not feel any of that with a ring, but that it what mine means to me.
Nowhere in that is "we chose to formalise our relationship for legal purposes by signing a form" - that is incidental.
If anything, my engagement ring looks more like a wedding ring, and some people assume it is. Doesn't change anything.