Step-by-step guide

Following these steps will ensure a proper fit

  1. Warm up the hand, massage/bowl
  2. Measure the MIDDLE FINGER
  3. Measure the THUMB FLEXIBILITY
  4. Measure FINGER and THUMB hole sizes

Constants to fill out on the spec sheet


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Mark the bowler's hand with a pen

  1. Mark the MIDDLE FINGER
    • Find and mark the bending point of the SECOND joint.
    • Measure 3/8 under the joint, draw a line.
    • Use this line for your measurement.

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Using the fitting tools


Evaluate the flexibility of the thumb.

The bowler's hand must be relaxed. 

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Complete your Fitting Sheet

  1. Use the same pitches as what's in the thumb.      Ex: Span: 3 1/2,  flexibility: 120° = 3/8 forward

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- Select a hole size that... Fingers easily passes through up to but not including second joint             même chose pour le pouce ?


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Not sure ?   When in doubt, reduce the hole by 1-64 inch. You can always enlarge the holes.


Revision #7
Created 4 February 2025 17:36:46 by Admin
Updated 10 April 2025 15:25:21 by Admin