三种大小的数字输入框，当 size 分别为 large 和 small 时，输入框高度为 40px 和 24px ，默认高度为 32px。
large
small
40px
24px
32px
There are three sizes available to a numeric input box. By default, the size is 32px. The two additional sizes are large and small which means 40px and 24px, respectively.
