正则表达式，怎样依次替换相同字符？

Question

我要把厘米换成英寸，match后将数组中每一项处理成英寸，再用一个for循环调换，这个正则表达式怎么写，依次替换相同字符。

<p>Product Material: <br> Cotton, spandex, polyester <br> Origin: China<br> <br> Size information: <br> M: Length 65cm, shoulder width 38cm, bust 45cm, sleeve length 17cm <br> L: Length 67cm, shoulder width 39cm, bust 107cm, sleeve length 18cm <br> XL: Length 69cm, shoulder width 40cm, bust 49cm, sleeve length 19cm <br> XXL: Length 71cm, shoulder width 41cm, bust 101cm, sleeve length 20cm
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