Weight and Height Measurements

Hello,

For abbreviations do we pluralize “pounds” and “ounces” as lbs and ozs?
Is 1 or 2 correct below?

1) The infant weighed 8lbs 5ozs.
2) The infant weighed 8lb 5oz.

And would we pluralize the abbreviation “inches” as “ins”?
3 or 4 below?

3) He stood 5ft 10ins tall.
4) He stood 5ft 10in tall.

Thank you

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