GR&R for Digital Ring Sizer

For optimal test results, please follow these guidelines:

📱 Use a recent phone

• For best results, use an Android from 2020 or later, or an iPhone from 2019 or later.

💡 Prepare your setup

• If possible, perform the test while standing.

• Place your hand and the reference card fully flat on a stable flat surface.

• Use bright, even lighting (avoid strong shadows or glare).

💳 Use a Standard-Sized card

• Use a credit card or a card with the exact same size as reference.

✋ Position your hand correctly

• Take off all rings and accessories.

• Keep fingers fully extended (not curled or bent).