Hello Chloe, that's a lovely photo of you all, and your nan's quilt. If you google Rings that Bind by Cheryl Phillips, you will find a video on youtube that shows an easy way to make the Db Wedding Ring, and once you understand the how-tos' you will realise how you can have a variety of styles, and even sizes.
Happy stitching and please post photos for us to see
Cheers