{"id":29464,"date":"2026-10-04T16:21:05","date_gmt":"2026-10-04T09:21:05","guid":{"rendered":"https:\/\/colorsbylove.com\/?p=29464"},"modified":"2026-10-04T16:25:00","modified_gmt":"2026-10-04T09:25:00","slug":"thai-ring-size-us-conversion","status":"publish","type":"post","link":"https:\/\/colorsbylove.com\/th\/thai-ring-size-us-conversion\/","title":{"rendered":"\u0e15\u0e32\u0e23\u0e32\u0e07\u0e40\u0e17\u0e35\u0e22\u0e1a\u0e44\u0e0b\u0e0b\u0e4c\u0e41\u0e2b\u0e27\u0e19\u0e44\u0e17\u0e22\u0e01\u0e31\u0e1a\u0e44\u0e0b\u0e0b\u0e4c US \u0e41\u0e25\u0e30\u0e27\u0e34\u0e18\u0e35\u0e27\u0e31\u0e14\u0e44\u0e0b\u0e0b\u0e4c"},"content":{"rendered":"

Ask for a ring in Bangkok and the shop will ask for your size as a number, like 52 or 54. That number is the inside of the ring measured around, in millimetres. It is the same system used across most of Europe, so a Thai size 54 and a European size 54 are the same ring. In the US the same ring is a size 7.<\/p>\n

This page puts all of them side by side, so you can order a ring here with confidence, or buy one at home in a size you know from Thailand.<\/p>\n

Thai ring size to US size chart<\/h2>\n

Find your US, UK or Japanese size and read across, or start from the Thai number.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Thai size (mm around)<\/th>\nDiameter<\/th>\nUS<\/th>\nUK and Australia<\/th>\nJapan<\/th>\n<\/tr>\n<\/thead>\n
47<\/td>\n14.9 mm<\/td>\nUS 4<\/td>\nH<\/td>\n7<\/td>\n<\/tr>\n
48<\/td>\n15.3 mm<\/td>\nUS 4.5<\/td>\nI<\/td>\n8<\/td>\n<\/tr>\n
49<\/td>\n15.7 mm<\/td>\nUS 5<\/td>\nJ\u00bd<\/td>\n9<\/td>\n<\/tr>\n
51<\/td>\n16.1 mm<\/td>\nUS 5.5<\/td>\nK\u00bd<\/td>\n11<\/td>\n<\/tr>\n
52<\/td>\n16.5 mm<\/td>\nUS 6<\/td>\nL\u00bd<\/td>\n12<\/td>\n<\/tr>\n
53<\/td>\n16.9 mm<\/td>\nUS 6.5<\/td>\nM\u00bd<\/td>\n13<\/td>\n<\/tr>\n
54<\/td>\n17.3 mm<\/td>\nUS 7<\/td>\nN\u00bd<\/td>\n14<\/td>\n<\/tr>\n
56<\/td>\n17.7 mm<\/td>\nUS 7.5<\/td>\nO\u00bd<\/td>\n16<\/td>\n<\/tr>\n
57<\/td>\n18.1 mm<\/td>\nUS 8<\/td>\nP\u00bd<\/td>\n17<\/td>\n<\/tr>\n
58<\/td>\n18.5 mm<\/td>\nUS 8.5<\/td>\nQ\u00bd<\/td>\n18<\/td>\n<\/tr>\n
60<\/td>\n18.9 mm<\/td>\nUS 9<\/td>\nR\u00bd<\/td>\n20<\/td>\n<\/tr>\n
61<\/td>\n19.4 mm<\/td>\nUS 9.5<\/td>\nS\u00bd<\/td>\n21<\/td>\n<\/tr>\n
62<\/td>\n19.8 mm<\/td>\nUS 10<\/td>\nT\u00bd<\/td>\n22<\/td>\n<\/tr>\n
63<\/td>\n20.2 mm<\/td>\nUS 10.5<\/td>\nU\u00bd<\/td>\n23<\/td>\n<\/tr>\n
65<\/td>\n20.6 mm<\/td>\nUS 11<\/td>\nV\u00bd<\/td>\n25<\/td>\n<\/tr>\n
66<\/td>\n21.0 mm<\/td>\nUS 11.5<\/td>\nW\u00bd<\/td>\n26<\/td>\n<\/tr>\n
67<\/td>\n21.4 mm<\/td>\nUS 12<\/td>\nX\u00bd<\/td>\n27<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Thai shops use every whole number, so you will also see sizes like 50, 55 or 59. Those sit between two US half sizes. A Thai 55 falls between US 7 and US 7.5, and a Thai 59 between US 8.5 and US 9.<\/p>\n

The Japanese size is easy to remember: take the Thai number and subtract 40. A Thai 52 is a Japanese 12.<\/p>\n

How our product pages show sizes<\/h2>\n

Every ring on our site lists both systems together, so you never have to convert. A size reads US 6 (52), meaning US size 6, Thai and European size 52. Our family and birthstone rings come in these sizes:<\/p>\n