Things that are about 1 millimeter:

Answer:
a wire and a knife bade ( but it depends)
Explanation:
wire;
gauge in. mm
15 0.0571" 1.45mm
16 0.0508" 1.291mm
17 0.0453" 1.15mm
18 0.0403" 1.024mm
knife:
1.4 mm thick 0.35 mm on the edge
3 mm (top) 3mm(centre) 1.5 mm on the edge
Hope this helps! :>