The diamond ring NFL star Travis Kelce used to propose to pop icon Taylor Swift could have a carat size of her lucky number 13, an appraiser told Forbes, and likely carries a price tag well over a half million dollars.<br /><br />READ MORE: https://www.forbes.com/sites/maryroeloffs/2025/08/27/taylor-swifts-engagement-ring-may-be-13-carats-expert-says-and-is-worth-an-estimated-650000/