I want to engrave a romantic message in Fiances band

My 2mm, size 7 engagement ring has 19 characters.

His size 8 ring has 41 characters and his size 8.5 ring has 42 characters.

Each jeweler has differant ways of engraving your ring(by hand or machine)so each store or company will offer a differant number of letters before hitting a limit ...remember that spaces count in the number...many keep it under 30 letters to fit in most 3mm plus size rings.Machine engraving is alot less expensive then by hand....time wise...while you wait in a few stores(machine)to a few weeks(by hand ).