Looking for specific type of beads

I attached a pic of some clear rounded beads of a decent large size...

i can't seem to find any...

or if there's a specific name to them I don't know O_O

Also...when if I buy them pre-strung...Is hould re-string them myself correct? what type of beading string should I use (it should be durable enough to hold a very long strand of beads!).

forgive me...as my knowledge of beading is like none O_O

they should have no designs in them...be at least 5mm, and not too pricey since i need a LOT!

so if anyone has seen them online or can point me to some online bead stores that ship to canada

I don't know if this company ships to Canada but check Firemountaingems. com. They have everything. I hope this link works.

http://www.firemountaingems.com/