{"id":23525,"date":"2026-05-08T17:20:29","date_gmt":"2026-05-08T08:20:29","guid":{"rendered":"https:\/\/fujimori.tokyo\/?p=23525"},"modified":"2026-05-08T17:20:32","modified_gmt":"2026-05-08T08:20:32","slug":"%e3%80%90%e4%bf%9d%e5%ad%98%e7%89%88%e3%80%91%e6%8c%87%e8%bc%aa%e3%82%b5%e3%82%a4%e3%82%ba%e6%af%94%e8%bc%83%e8%a1%a8%ef%bd%9c%e6%b5%b7%e5%a4%96%e3%82%b5%e3%82%a4%e3%82%ba%e3%82%92%e6%97%a5%e6%9c%ac","status":"publish","type":"post","link":"https:\/\/fujimori.tokyo\/en\/blog\/23525\/","title":{"rendered":"Conversion of overseas sizes to Japanese sizes. Tips on how to measure without making mistakes."},"content":{"rendered":"

Ring size descriptions vary from country to country. When considering foreign brands or imported jewelry, many people may be concerned that they do not know what size they are.<\/p>\n\n\n\n

First, let's check the size comparisons for the major countries.<\/p>\n\n\n\n

1. ring size comparison chart (JP \/ US \/ UK \/ EU)<\/h3>\n\n\n\n
Japan (JP)<\/th>United States (US)<\/th>United Kingdom (UK)<\/th>Europe (EU)<\/th><\/tr><\/thead>
1<\/td>1<\/td>C<\/td>41<\/td><\/tr>
1.5<\/td>1.5<\/td>C+<\/td>41.5<\/td><\/tr>
2<\/td>2<\/td>D<\/td>42<\/td><\/tr>
2.5<\/td>2.25<\/td>D+<\/td>42.5<\/td><\/tr>
3<\/td>2.5<\/td>E<\/td>43<\/td><\/tr>
3.5<\/td>2.75<\/td>E+<\/td>43.5<\/td><\/tr>
4<\/td>3<\/td>F<\/td>44<\/td><\/tr>
4.5<\/td>3.25<\/td>F+<\/td>44.5<\/td><\/tr>
5<\/td>3.5<\/td>G<\/td>45<\/td><\/tr>
5.5<\/td>3.75<\/td>G+<\/td>45.5<\/td><\/tr>
6<\/td>4<\/td>G+<\/td>46<\/td><\/tr>
6.5<\/td>4.25<\/td>H<\/td>46.5<\/td><\/tr>
7<\/td>4.5<\/td>H+<\/td>47<\/td><\/tr>
7.5<\/td>4.6<\/td>I<\/td>47.5<\/td><\/tr>
8<\/td>4.7<\/td>I+<\/td>48<\/td><\/tr>
8.5<\/td>4.8<\/td>I++<\/td>48.5<\/td><\/tr>
9<\/td>5<\/td>J<\/td>49<\/td><\/tr>
9.5<\/td>5.25<\/td>J+<\/td>49.5<\/td><\/tr>
10<\/td>5.5<\/td>K<\/td>50<\/td><\/tr>
10.5<\/td>5.75<\/td>K+ (Japanese kick-boxing promotion)<\/td>50.5<\/td><\/tr>
11<\/td>6<\/td>L<\/td>51<\/td><\/tr>
11.5<\/td>6.25<\/td>L+<\/td>51.5<\/td><\/tr>
12<\/td>6.5<\/td>L++<\/td>52<\/td><\/tr>
12.5<\/td>6.6<\/td>M<\/td>52.5<\/td><\/tr>
13<\/td>6.7<\/td>M+<\/td>53<\/td><\/tr>
13.5<\/td>6.9<\/td>N<\/td>53.5<\/td><\/tr>
14<\/td>7<\/td>N+<\/td>54<\/td><\/tr>
14.5<\/td>7.25<\/td>O<\/td>54.5<\/td><\/tr>
15<\/td>7.5<\/td>O+<\/td>55<\/td><\/tr>
15.5<\/td>7.75<\/td>O++<\/td>55.5<\/td><\/tr>
16<\/td>8<\/td>p<\/td>56<\/td><\/tr>
16.5<\/td>8.25<\/td>P+ (e.g. P+++A+B+)<\/td>56.5<\/td><\/tr>
17<\/td>8.5<\/td>Q<\/td>57<\/td><\/tr>
17.5<\/td>8.75<\/td>Q+<\/td>57.5<\/td><\/tr>
18<\/td>9<\/td>R<\/td>58<\/td><\/tr>
18.5<\/td>9.25<\/td>R+<\/td>58.5<\/td><\/tr>
19<\/td>9.5<\/td>S<\/td>59<\/td><\/tr>
19.5<\/td>9.75<\/td>S+<\/td>59.5<\/td><\/tr>
20<\/td>10<\/td>T<\/td>60<\/td><\/tr>
20.5<\/td>10.1<\/td>T+.<\/td>60.5<\/td><\/tr>
21<\/td>10.2<\/td>T++<\/td>61<\/td><\/tr>
21.5<\/td>10.3<\/td>T+++<\/td>61.5<\/td><\/tr>
22<\/td>10.5<\/td>U<\/td>62<\/td><\/tr>
22.5<\/td>10.75<\/td>U+<\/td>62.5<\/td><\/tr>
23<\/td>11<\/td>V<\/td>63<\/td><\/tr>
23.5<\/td>10.25<\/td>V+<\/td>63.5<\/td><\/tr>
24<\/td>11.5<\/td>W<\/td>64<\/td><\/tr>
24.5<\/td>11.75<\/td>W+<\/td>64.5<\/td><\/tr>
25<\/td>12<\/td>X<\/td>65<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\n

*Please use this as a guide, as there may be slight variations depending on the brand and design.<\/p>\n<\/blockquote>\n\n\n\n

\n\n\n\n

2. the \"point of measurement\" to avoid failure<\/h3>\n\n\n\n

There is a method of measuring with string or paper on the net, but we do not recommend this method because it can cause large errors depending on the shape of the fingers and the force with which the measurement is taken.<\/p>\n\n\n\n

The most reliable way is to take measurements using a \"special ring gauge\" at your local jewelry store.<\/strong> <\/p>\n\n\n\n

\"\u30ea\u30f3\u30b0\u30b5\u30a4\u30ba\u8a08\u6e2c\"
We offer two types of widths: normal and wide.<\/figcaption><\/figure>\n\n\n\n

In doing so, please keep the following points in mind.<\/p>\n\n\n\n

(1) Match the design (width)<\/h4>\n\n\n\n

The wider the ring, the more ground contact area it has, and the easier it is to feel pressure.<\/p>\n\n\n\n