What is the exact height of six-one, two-twenty
He was a big guy—about six-one, two-twenty, and most of it muscle.

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Height: Six foot one.  Weight: 220 pounds.  Imperial system, used in the Uk, the US, some Commonwealth countries and Hong Kong.

You can look up the metric equivalents from a conversion table on the internet and let us know.

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It looks like it's using the Imperial System, as opposed to the Metric System.

According to Google, 6 feet and 1 inch is about 185cm, and 220 pounds is about 100kg.

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Six feet, one inch tall. "two-twenty" refers to his weight. 220lbs.