This lot has 2 pairs with top drilled holes (triangular pieces) and 2 pairs with center drilled holes. These pieces were found on Pacific Ocean seashores and likely originate from old canning jars or insulator covers.
The largest pair is 1.5 cm long, and the other three pairs are around 1 cm long, each. US dime in photo for size reference.
Your sea glass will arrive with a card that tells the short story of sea glass and the name of the ocean where the pieces were found.