English, 15th century.
Ring size S UK / 9 US.
Weighs 6.2 grams.
The fluted band is set with a crowned heart flanked by roses.
For comparable examples see the British museum, Registration number’s: 1865,0408.61, AF.1114 and SLRings.84.
https://www.britishmuseum.org/collection/object/H_1865-0408-61
https://www.britishmuseum.org/collection/object/H_AF-1114
https://www.britishmuseum.org/collection/object/H_SLRings-84