Thanks for the information.
I did more research from google and found some dimensions here and I would like to share.
http://www.shippbelting.com/v-guides.htm
http://www.bodebelting.com/44c1759df2f6182ec3a8927dcf683d9c_BodeBelting_Timing-Belts_GB.pdf
I'll do more research and post it here if...
I have a drawing of conveyor belt with a v-guide somebody made. It has "K10 notch" note with no dimensions. I'm assuming it's european standard. where could I find its dimensions?
Thank you for your help.