Ear stretching????????????

i used plastic when i was stretching, and i used tapers(spikes) to stretch, but when i got to my size which is 10mm i have a metal tunnel in and i have had no problems. metal should be good too but i would never use wood, i used a metal to stretch my belly butten piercing because i couldn't fit a bar in:) <-don't try that, it's painfull:) hope that helps xx