CSS font-size Vs. HTML font size

Notes:

CSS font-size property Vs. HTML font tag size attribute:
It is used to specify the size of the font to be applied
Values: xx-small | x-small | smaller | small | medium | large | larger | x-large | xx-large | length | %

Note:16px = 1em (px to em Ex: 10px / 16px = 0.625em)
size=1 == font-size:x-small == font-size:10px == font-size:0.625em
size=2 == font-size:small == font-size:13px == font-size:0.8125em
size=3 == font-size:medium == font-size:16px == font-size:1.0em
size=4 == font-size:large == font-size:18px == font-size:1.125em
size=5 == font-size:x-large == font-size:24px == font-size:1.5em
size=6 == font-size:xx-large == font-size:32px == font-size:2.0em
size=7 == == font-size:48px == font-size:3.0em

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