diff --git a/www/conservancy/templates/supporter/form_partial.html b/www/conservancy/templates/supporter/form_partial.html
index 4ddfef32ae93be6f51d8641ea01fe37fc5a68d00..1fafd1959f7e478175787ff463d52dfaa9f93a22 100644
--- a/www/conservancy/templates/supporter/form_partial.html
+++ b/www/conservancy/templates/supporter/form_partial.html
@@ -104,19 +104,25 @@ This partial accepts these optional parameters:
         <label for="os0">Shirt size: </label>
         <div class="input-group">
           <select name="os0" tabindex="30">
-            <option value="MenS">Men's S</option>
-            <option value="MenM">Men's M</option>
-            <option value="MenL">Men's L</option>
-            <option value="MenXL">Men's XL</option>
-            <option value="Men2XL">Men's 2XL</option>
-            <option value="StandardLadiesS">Standard Women's S</option>
-            <option value="StandardLadiesM">Standard Women's M</option>
-            <option value="StandardLadiesL">Standard Women's L</option>
-            <option value="StandardLadiesXL">Standard Women's XL</option>
-            <option value="FittedLadiesS">Fitted Women's S</option>
-            <option value="FittedLadiesM">Fitted Women's M</option>
-            <option value="FittedLadiesL">Fitted Women's L</option>
-            <option value="FittedLadiesXL">Fitted Women's XL</option>
+            <optgroup label="Men's Tees">
+              <option value="MenS">Men's S</option>
+              <option value="MenM">Men's M</option>
+              <option value="MenL">Men's L</option>
+              <option value="MenXL">Men's XL</option>
+              <option value="Men2XL">Men's 2XL</option>
+            </optgroup>
+            <optgroup label="Women's Standard Tees">
+              <option value="StandardLadiesS">Standard Women's S</option>
+              <option value="StandardLadiesM">Standard Women's M</option>
+              <option value="StandardLadiesL">Standard Women's L</option>
+              <option value="StandardLadiesXL">Standard Women's XL</option>
+            </optgroup>
+            <optgroup label="Women's Fitted Tees">
+              <option value="FittedLadiesS">Fitted Women's S</option>
+              <option value="FittedLadiesM">Fitted Women's M</option>
+              <option value="FittedLadiesL">Fitted Women's L</option>
+              <option value="FittedLadiesXL">Fitted Women's XL</option>
+            </optgroup>
           </select>
         </div>
       </div>