Hair clips - the kind that has those interlocking spikes - I believe they are commonly referred to as Claw or Jaw Hair Clips. I find that the smallest ones are invaluable when it comes to seaming.
They're easy to use and snag-free. Even on slippery bamboo. I don't recommend using orchid clips (they look the same but are used to hold floppy orchid stems to wooden stakes) as they tend to have rough edges. Bad for knits.
but quite sturdy. I also use them to "baste" pieces together to check for fit before committing the time and effort to seaming. For the blue bamboo camisole (more about that later) I used my clips to baste the strap onto the body so I could try it on to see if I needed to shorten or lengthen it.
Best of all, they're inexpensive and easy to find. I picked up mine at Target. Online, they're available here. Happy seaming!