Size of buttons?

[vanillajonathan]

What exactly does the "size" property refer to in the context of buttons?
Is it font-size?
It is rather ambiguous as to what it means.

Property	Value
Height	32px
Padding	8px
Size	13px

If size refers to font-size and padding is 8 pixel on the top and 8 pixel on the bottom then that would be 8 + 13 + 8 which equals 29 which does not add up to the declared height of 32 pixels.

This leaves me confused.

[brassy-]

A text with a 13px font-size is not equal to 13px computed.
The height of the button is hard-coded.

(a codepen is coming ;) )

[aminalhazwani]

Here is an early codepen we used for testing WCGA.