Changing or updating your shirt size is an option available to participants up to certain deadline, generally 3-4 weeks before the race. You can update your shirt size through your RunSignUp profile page, simply follow the steps below.
Step 1. Login to your RunSignUp account and click PROFILE.
Step 2. Click My Registered Races.
Step 3. Find the race and click MANAGE REGISTRATION.
Step 4. Click the GIVEAWAY tab and select your shirt size from the dropdown menu. Once complete press CONTINUE to confirm your change.
If the option to change your shirt size is not listed under the Giveaway tab the deadline to change your shirt size has passed.