鸽子蛋

戒指指圈大小的标准，称为手寸，现代的手寸是以号来表示的，东方人的手寸范围在8号至28号之间，在按手寸选购戒指时，夏天以戴上戒指后稍紧为宜，冬天以戴上戒指后可左右转但又不脱落为宜，在戴戒指时要是觉得太松，可在戒指的指轮内绕上几圈红线或丝线，要是觉得太紧，可以在手指上涂点肥皂液，这样就能顺利地戴上脱下了。 
如果您在家里订制戒指，不清楚自己手寸的号数，可以用这个方法量出来：先用丝线绕手指一圈，再把丝线剪下来拉直，用尺子量出丝线的长短，然后对照我们提供的手寸对照表！ 

         号数                  直径（mm）              周长（mm） 
         1                      12.3                     38.6 
         2                     12.6                     39.6 
         3                     12.8                     40.5 
         4                     13.3                     41.8 
         5                     13.7                     43.0 
         6                     14.1                     44.3 
         7                     14.4                     45.2 
         8                     14.8                     46.5 
         9                     15.1                     47.4 
        10                     15.4                     48.4 
        11                     15.8                     49.6 
        12                     16.1                     50.6 
        13                     16.5                     51.8 
        14                     16.9                     53.1 
        15                     17.2                     54.0 
        16                     17.6                     55.3 
        17                     17.9                     56.2 
        18                     18.3                     57.5 
         19                     18.6                     58.4  
        20                     19.0                     59.7 
        21                     19.2                     60.3 
         22                     19.5                     61.2  
         23                     19.9                     62.5  
        24                     20.2                     63.4 
        25                     20.7                     65.0 
        26                     21.0                     66.0 
        27                     21.3                     66.9