12 mm = 0.47 inches.
A normal earring is 18 gauge. I'm not sure of the mm..
Not very big.
A 9mm earing is 0.35433 inches
The hoop is 18 inches / 457.2 mm in diameter.
30 mm is only 3 cm
Big Pine Key is at MM 30, Key West ends at MM 0
A length of 1.35 metres.
30mm is 1.1811 inches.Direct Conversion Formula 30 mm*1 in25.4 mm=1.181102362 inThere are 2.54 centimeters in an inch and 10 mm in a cm. That gives you 1.1811 inches.
300 000 mm2 or 3 000 cm2 or 30 dm2 or 0.3 m2
30 mm = 0.098425 '
1 cm = 10 mmThen 30 mm is larger than 1 cm.