You sure can! We offer rings in several products within our Jewelry Collection with the option of whole sizes 5 through 10. Half-sizes are not currently offered and we do not produce custom sizes.
Rings will not be included in the Essentials Collection products, which are marketed as being ringless.
Disclaimer: For any free jewelry associated to promotional offers, sizes and styles may vary, but our Fulfillment Center will strive to ship in the next available size.