Your order number can be found in lots of places.
First, it is listed on your order confirmation, shipping confirmation, and delivery confirmation emails from FIGS. Check your spam or junk folder if you did not receive them.
Second, your order number is listed on your packing insert included with your order.
Third, you can locate your order number and history by logging into your FIGS account. Last, if you received your order via FedEx shipping, it is included on the reference tab of your tracking number.