The silver are very cute, look well made however the run a full size small- tight in both the length and the straps - no returns 
Is that what woot customer support said? You could try contacting them if you haven’t already.
You can’t do a self return if it’s below $20. CS can help you out.
Please reach out to Woot! Customer Service. To speed things up, let them know if you prefer a return/refund or a replacement (if possible).
Please allow 24-48h for them to respond.
Self-Return: Items without Li-Ion batteries can be self-returned within 30 days. Go to your Order Details to get started. The return label will be emailed from UPS.
Browser: Use the Woot! Customer Service form.
Woot! App: Choose Account from the bottom navigation and then Support.
Note: Woot! Customer Service replies go to the email address on your Woot! account, not your Amazon login email if used/different.