Use the LAMOR&CO engagement ring size guide to choose your U.S. ring size before placing a made-to-order ring order. We offer sizes 3 through 12 in half-size increments.

Available U.S. Ring Sizes

3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, and 12.

Best Way to Confirm Your Size

For the most reliable result, have your finger measured by a professional jeweler using standard U.S. ring-sizing tools. If you already own a ring that fits the same finger well, a jeweler can also measure that ring.

Tips for Measuring Your Finger

• Measure near the end of the day, when finger size is generally more representative of normal wear.
• Avoid measuring when your hands are unusually cold, hot, or swollen.
• The ring should pass over the knuckle with slight resistance and feel secure at the base of the finger.
• Consider the knuckle as well as the base of the finger when judging fit.
• Band width and personal comfort can affect how a size feels, so professional measurement is preferred when you are between sizes.

Before You Order

LAMOR&CO engagement rings are made to order in the size selected at checkout. Confirm the correct U.S. ring size before placing your order. If you are between sizes or uncertain, contact LAMOR&CO before purchasing.

More Buying Guidance

For help comparing diamond specifications, gold options, and setting styles, visit our Lab-Grown Diamond Education Guide and Customer Care FAQ.