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Williams Route 66 Marathon Participant Shirt Sizing Guide

Please review the shirt size policy and sizing charts below carefully to ensure you have selected the correct size.

  • Sizes are not guaranteed for participants who register after September 1.
  • A separate, limited supply of shirts will be available at packet pickup for exchange, as supplies last, for participants who want a different size than indicated on their registration.
  • Participant shirts are short sleeve technical fabric in both mens and ladies cuts.
  • The Route 66 Marathon will donate $5 to the Tulsa Area Master Recyclers for each participant that chooses not to receive a shirt.
  • Logo Shirts, Jackets and Technical Finisher Shirts will be available for purchase at the Fleet Feet Sports Tulsa, the expo and online.
  • Please click here to edit your registration information and change your shirt size.


Sizing Chart for the Williams Route 66 Marathon Participant Entry Shirts