Rings:  Forget the string  or strip of paper around your finger.  Sometimes they "almost" work.  I do not do "almost" work.  Call me and I will send you a set of ring sizers for an accurate measurement.
(2)  Place edge of wrist against counter and measure between cases being careful not to move the cases.  This is your height_________"
(3) Finally, wrap a plastic or cloth tailors tape measure around wrist at desired bracelet location. This is your circumference________" 
You may substitute a piece of paper for the tape if one is not available.
Cuff Bracelets:
(1)  Place wrist against edge of kitchen counter or table between two CD cases or the like where you want the bracelet to rest.  Some like it above,below, or on the knuckle.   Remove wrist and measure between cases being careful not to move the cases.  This is your width_______".

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This shows 5-1/2"
Chain or Link Bracelets: 
 desired bracelet location.  This is your circumference and the only measurement I need.  
  Wrap a plastic or cloth tailors tape measure around wrist at

Artist designed handcrafted jewelry of silver and gold

rlangbert.com
How to Measure for commission work

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Rope Bracelets: 

STEP 1:
Measure your wrist with a flexible tape measure or a strip of paper just below the wrist bone, where you would normally wear your bracelet.
STEP 2: If you are using a plain strip of paper, mark your size with a pen on that paper. Then measure that paper strip with a ruler. That would be your wrist size.
STEP 3: To find your bracelet size, add your wrist size with the appropriate measurements below. That is the only number I need.

FITTING STYLE: Add inches to your wrist size: Snug fit add 1/4" to 1/2",   Comfort fit add 3/4" to 1",   Loose fit add 1-1/4" to 1-1/2"
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