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Important: make sure your printer is scaled to 100% on a standard 8.5” x 11” page.
Cut out the measuring tool using the dotted line as a guide.
Hold the left side (L) behind your left ear and stretch the tool across the back of your head (toward your right ear).
Based on the pictures below, choose the size that applies to you.
If the right side (R) DOES NOT reach the back of your right ear, choose Trekz Titanium
If the right side (R) DOES reach the back of your right ear, choose Trekz Titanium Mini