0.0508 mm
Assuming the two are measurements of thickness, it should be obvious that 30 mm is thicker!
The thickness of the US quarter is 1.75 mm
0.7 mm = 21 gauge- Google it
The closest would be 18 gauge which is 1.27 mm
what is 9gauge in mm thickness
0.0508 mm
1.024 mm
0.405 mm
12 gauge is thicker than 14 gauge.
1.27 mm (USG)
If it is steel, the thickness is 0.0359 ins (35.9 thou), or 0.9119 mm. See Wikipedia 'Sheet Metal Gauge' for a full table of thicknesses
Metal gauge is inversely proportional to thickness, the bigger the thickness lesser the gauge. Following is conversion table:- 10 G : 3.15 MM 11 G : 2.8 MM 12 G : 2.5 MM etc....
1.27 mm
In Imperial standard (swg), 16 g is 0.064" (1.63mm) thick.
Probably 25 gauge, which is .556 mm thick. However, 26 gauge is close too, it is .478 mm thick.
ANSWERIn the case of polythene, gauge can be converted to thickness by dividing by four to get the thickness in micron or dividing by 4000 to get the thickness in mm. Here are some common examples:100 gauge = 25 micron = 0.025mm120 gauge = 30 micron = 0.03mm200 gauge = 50 micron = 0.05mm250 gauge = 62.5 micron = 0.0625mm400 gauge = 100 micron = 0.1mm