Question: what are standard drill sizes?
Answer:  mm. 0.0394. 1.1 mm. 0.0433. 1.2 mm. 0.0472. ...   mm. 0.0787. 2.1 mm. 0.0827. 2.2 mm. 0.0866. ...   mm. 0.1181. 3.1 mm. 0.1221. 3.2 mm. 0.1260. ...   mm. 0.1575. 4.1 mm. 0.1614. 4.2 mm. 0.1654. ...   mm. 0.1969. 5.1 mm. 0.2008. 5.2 mm. 0.2047. ...   mm. 0.2362. 6.1 mm. 0.2402. 6.2 mm. 0.2441. ...   mm. 0.2756. 7.1 mm. 0.2795. 7.2 mm. 0.2835. ...   mm. 0.3150. 8.1 mm. 0.3189. 8.2 mm. 0.3228.