what size lug bolts?

[00bmw323]

my wheels are currently et20 and want to run 20mm spacers what size lug bolts do i need??

[schroedin]

http://www.ecstuning.com/BMW-E46-323i-M52_2.5L/Wheels/Spacers/ES205208/

:)

[00bmw323]

thanks but i need the size of the bolts..reason is i found some 20mm spacers cheap but no bolts...so im going to get some off ebay but need to know what size