Not sure of your fingersize? No problem. You can order a ring gauge and take your own finger measurements from the comfort of your own home.
The Multisizer works like a belt. Simply push the end through the buckle to form a ring shape. Slip the Multisizer onto your finger. Adjust to give a comfortable fit, checking that it just slips back over the knuckle. When best fit is achieved, read off size indicated by the arrow.