Free Ring Size Converter
Enter your ring inside diameter or inside circumference to find ring size equivalents across all international sizing systems.
一站式国际戒指尺寸换算工具
选择合适的戒指尺寸从来不是一件轻松的事,尤其是面对 US ring size、UK ring size、法国、德国、日本、瑞士等多种截然不同的编号体系时,消费者很容易在换算中出错。这款在线戒指尺寸转换器集成了完整的 ring size chart,同时提供 ring diameter converter 与 ring circumference converter 功能,能够帮你快速将手指周长或内径转换为任何主流国际标准尺寸。无论你是在为伴侣秘密挑选订婚戒指,还是想确认海淘商品的对应尺码,只需输入一个已知数值,工具就会立刻呈现所有等效尺寸,省去手动查阅对照表的时间和烦恼。
在家测量手指尺寸的基本步骤
在没有任何专业工具的情况下,只需一根细绳(或纸条)和一把直尺就能大致测出手指周长:
- 将绳子环绕在目标手指的最粗位置——通常是指关节,因为戒指必须能顺畅滑过此处。注意不要拉得太紧,以免勒出凹陷。
- 在绳子两端重叠的交叉点用笔做记号。
- 展开绳子,用直尺量出记号点之间的长度,这个数值就是你的手指周长。
- 把测得的周长输入本转换器,工具会自动计算出对应的内径以及各国家/地区的尺寸编号。
如果你希望自己计算直径,可以用圆周率 对周长做除法:
其中 。当然,借助转换器可以直接跳过这一步,同时避免四舍五入造成的微小误差。
提高测量准确性的其他途径
绳尺法虽然方便,但精度有限。以下方法能提供更可靠的参考:
- 珠宝店专用工具:金铺或珠宝专柜配备金属环规和游标卡尺,可以在店内直接试戴并记录精确尺寸。
- 打印圆形对照图:许多在线珠宝商提供免费的 PDF 尺寸模板。打印时务必取消“缩放”选项,然后将你已有的戒指内圈对准模板上的圆圈,找到最吻合的直径。若手边没有戒指,仍需先用绳子测出周长。
- 在线交互式尺寸器:部分零售网站提供基于参照物(如信用卡、SD 卡、直尺)的屏幕校准工具,只需在镜头前放置已知尺寸的物品,系统就能估算你的手指尺寸。
挑选戒指尺寸的关键提醒
不同厂商的模具和标准可能存在细微偏差,因此每次购买时都应查阅该品牌的官方尺寸表或直接咨询客服。本转换器给出的对照表基于行业通用标准,可作为可靠参考,但无法覆盖所有品牌的特殊版型。
在实际操作中,还有几点值得特别留意:
- 测量准确的手指:左右手上同一位置的手指周长可能不一样,请务必测量最终佩戴戒指的那根手指。
- 测量时间的选择:手指在早晨偏细,傍晚因血液循环和日常活动通常最粗。建议在傍晚进行测量,以得到偏大但更安全的数值。
- 宽戒需要预留空间:如果戒圈宽度超过 6 mm,皮肤不易向两侧移动,容易勒出红印。此时应考虑比标准尺寸大半号。
- 反复验证:理想的佩戴感是“紧密但不勒,转动但不脱落”。在不同时间、不同气温下多次试戴,特别是对于订婚戒指或结婚戒指,确保长期佩戴舒适。
国际戒指尺寸对照表(简化版)
下表覆盖从内径 11.53 mm 到 22.33 mm 的常见范围。你也可以直接使用本工具中「Ring size equivalents」功能,免去手动查表的步骤。
| 内径 (mm) | 内径 (in) | 内周长 (mm) | 内周长 (in) | UK/AU | US/CA | France | Germany | Japan | Switzerland |
|---|---|---|---|---|---|---|---|---|---|
| 11.53 | 0.454 | 36.22 | 1.43 | – | 0 | – | – | – | – |
| 11.95 | 0.474 | 37.54 | 1.49 | A | 1/2 | – | – | – | – |
| 12.37 | 0.487 | 38.86 | 1.53 | B | 1 | – | 1 | – | – |
| 12.78 | 0.503 | 40.15 | 1.58 | C | 1 1/2 | – | – | – | – |
| 13.21 | 0.520 | 41.50 | 1.63 | D | 2 | 41 1/2 | 13 1/2 | 2 | 1 1/2 |
| 13.61 | 0.536 | 42.76 | 1.68 | E | 2 1/2 | 42 3/4 | 13 3/4 | 3 | 2 3/4 |
| 14.05 | 0.553 | 44.14 | 1.74 | F | 3 | 44 | 14 | 4 | – |
| 14.36 | 0.565 | 45.11 | 1.77 | G | 3 3/8 | 45 1/4 | – | 5 | 5 1/4 |
| 14.45 | 0.569 | 45.40 | 1.79 | G 1/4 | 3 1/2 | – | 14 1/2 | – | – |
| 14.56 | 0.573 | 45.74 | 1.80 | G 1/2 | 3 5/8 | – | – | 6 | – |
| 14.65 | 0.577 | 46.02 | 1.81 | H | 3 3/4 | 46 1/2 | – | – | 6 1/2 |
| 14.86 | 0.585 | 46.68 | 1.84 | H 1/2 | 4 | – | 15 | 7 | – |
| 15.04 | 0.592 | 47.25 | 1.86 | I | 4 1/4 | 47 3/4 | – | – | 7 3/4 |
| 15.27 | 0.601 | 47.97 | 1.89 | I 1/2 | 4 1/2 | – | 15 1/4 | 8 | – |
| 15.40 | 0.606 | 48.38 | 1.90 | J | 4 5/8 | 49 | 15 1/2 | – | 9 |
| 15.70 | 0.618 | 49.32 | 1.94 | J 1/2 | 5 | – | 15 3/4 | 9 | – |
| 15.80 | 0.622 | 49.64 | 1.95 | K | 5 1/8 | 50 | – | – | 10 |
| 16.00 | 0.630 | 50.27 | 1.98 | K 1/2 | 5 3/8 | – | – | 10 | – |
| 16.10 | 0.634 | 50.58 | 1.99 | L | 5 1/2 | 51 3/4 | 16 | – | 11 3/4 |
| 16.51 | 0.650 | 51.87 | 2.04 | M | 6 | 52 3/4 | 16 1/2 | 12 | 12 3/4 |
| 16.92 | 0.666 | 53.16 | 2.09 | N | 6 1/2 | 54 | 17 | 13 | 14 |
| 17.35 | 0.683 | 54.51 | 2.15 | O | 7 | 55 1/4 | 17 1/4 | 14 | 15 1/4 |
| 17.75 | 0.699 | 55.76 | 2.20 | P | 7 1/2 | 56 1/2 | 17 3/4 | 15 | 16 1/2 |
| 18.19 | 0.716 | 57.15 | 2.25 | Q | 8 | 57 3/4 | 18 | 16 | 17 3/4 |
| 18.53 | 0.729 | 58.21 | 2.29 | Q 3/4 | 8 1/2 | – | 18 1/2 | 17 | – |
| 18.61 | 0.733 | 58.47 | 2.30 | R | 8 5/8 | 59 | – | – | 19 |
| 18.89 | 0.748 | 59.34 | 2.35 | R 3/4 | 9 | – | 19 | 18 | – |
| 19.10 | 0.752 | 60.00 | 2.36 | S | 9 1/8 | 60 1/4 | – | – | 20 1/4 |
| 19.41 | 0.764 | 60.98 | 2.40 | S 3/4 | 9 1/2 | – | 19 1/2 | 19 | – |
| 19.51 | 0.768 | 61.29 | 2.41 | T | 9 5/8 | 61 1/2 | – | – | 21 1/2 |
| 19.84 | 0.781 | 62.33 | 2.45 | T 1/2 | 10 | – | 20 | – | – |
| 20.02 | 0.788 | 62.89 | 2.48 | U | 10 1/4 | 62 3/4 | – | 21 | 22 3/4 |
| 20.20 | 0.797 | 63.46 | 2.50 | U 1/2 | 10 1/2 | – | 20 1/4 | 22 | – |
| 20.32 | 0.800 | 63.84 | 2.51 | V | 10 5/8 | 63 | – | – | 23 3/4 |
| 20.68 | 0.814 | 64.97 | 2.56 | V 1/2 | 11 | – | 20 3/4 | 23 | – |
| 20.76 | 0.817 | 65.22 | 2.57 | W | 11 1/8 | 65 | – | – | 25 |
| 21.08 | 0.830 | 66.22 | 2.61 | W 3/4 | 11 1/2 | – | 21 | 24 | – |
| 21.18 | 0.834 | 66.54 | 2.62 | – | 11 5/8 | 66 1/4 | – | – | 26 1/4 |
| 21.49 | 0.846 | 67.51 | 2.66 | Y | 12 | 67 1/2 | 21 1/4 | 25 | 27 1/2 |
| 21.89 | 0.862 | 68.77 | 2.71 | Z | 12 1/2 | 68 3/4 | 21 3/4 | 26 | 28 3/4 |
| 22.33 | 0.879 | 70.15 | 2.76 | Z+1 | 13 | – | 22 | 27 | – |
表中空白(–)表示该标准中没有直接对应的编号。实际选购时仍应以品牌官方尺寸为最终依据。
如何操作本转换器
在工具面板中点击「Ring size equivalents」区块,选择你已知的尺寸体系(例如 US & Canada、UK & Australia、France & Russia 等),输入对应的尺寸编号或手动填入周长/直径数值,其余体系的结果便会同步显示。无论是购买海外品牌的产品,还是对比本地珠宝商的尺码,都能在几秒钟内完成换算。
借助本文介绍的测量技巧、注意事项以及这份国际对照表,再配合转换器的即时换算能力,你完全可以自信地找到既美观又合手的戒指。
FAQ
1. How can I measure my ring size at home with just a string and a ruler?
Wrap a string around the thickest part of the finger (usually the knuckle), mark where it overlaps, then measure that length with a ruler to get the finger’s circumference. Enter that value into the ring size converter, and it will show the corresponding international sizes.
2. Should I go up a size if the ring band is wider than normal?
Yes, if the ring width exceeds 6 mm, consider ordering half a size larger. The skin cannot move aside as easily under a wide band, so a slightly bigger size prevents discomfort and “ring marks.”
3. What is the best time of day to measure my finger for a ring?
Measure in the evening. Fingers are typically thinner in the morning and swell during the day due to activity and circulation, so an evening measurement provides a safer, slightly larger result.
4. How do I convert a US ring size to a UK ring size using this tool?
Open the converter and locate the “Ring size equivalents” section. Choose “US & Canada” as your input system, enter your US size, and the tool will instantly display the corresponding UK/Australia size along with other international equivalents.
5. Does this converter support sizing standards beyond US and UK?
Yes. It covers US & Canada, UK & Australia, France, Germany, Japan, and Switzerland, allowing you to convert any known measurement or size number to all supported systems using the built-in ring size chart and conversion logic.
How to Use
- Enter the inside diameter or inside circumference of your ring and select the measurement unit (mm, cm, or inches).
- The linked measurement is calculated automatically using the relationship between diameter and circumference (C = pi x D).
- View your ring size equivalents across US & Canada, UK & Australia, France, Germany, Japan, and Switzerland sizing systems instantly.