The smallest BB is 4.5mm. As far as I know there is no 1mm BB gun.
Snails are 1mm to 312 mm long. That means they don't weigh much...
0.001 metres.
0.7
1mm
1mm 1mm
1mm is approximately 0.03937 in
1mm
0$-$1MM+
Define the measurement
Formica® decorative laminates weigh approximately 1.4kg per square metre for every 1mm thickness of the sheet.
1mm converts to 0.000001km
1/10cm=1mm