Stupid little headcanon.

Yk imagine if Rhys's mom was actually a massive Tamsand shipper who just ADORED Tamlin, and because he could shapeshift would use him as a model for all her dresses. Would watch her son and Tamlin interact and also saw that Tamlin made big, wide eyes at the ring her mother had given her to pass onto her children, and knew he would like it as an engagement ring, and also knew he would be able to absolutely SLAUGHTER the weaver.

In conclusion, Rhys' mother made those dresses for Tamlin, and hid the ring for Tamlin.

And the reason Feyre fit the dresses so perfectly was because Rhys' mother actually made SO MANY DIFFERENT DRESSES because Tam could shapeshift any body type, and Rhys just picked out the ones in Feyre's size.