The ring measures 5/8" wide, (16mm) and is slightly flared for comfort. The garnet measures 6mm, and the citrine is 4mm. The ring can be made in any size, and you should allow approximately 1 size larger than your regular ring size for the wide band.
I am happy to use other stones if you like, so feel free to ask! Some other lovely combinations are: aquamarine and blue topaz, pink rhodolite garnet and peridot, iolite and peridot, carnelian and turquoise - really just about anything you can dream up! (price may vary slightly for some stones)
Please let me know the size you need in the message to seller when you place your order, and if you would like me to use different stones. Thanks so much!