Carrier beads are made in the Czech Republic. They are called Carrier beads because they are intended as a support, for a peyote strip, a carrier of Delica strips. The peyote strips are usually made from Miyuki Delicas (although size 11 seed beads also work) and are worked with 6 beads across (which makes them 3 beads per row) and 48 rows long.
The strips are zipped (stitched) together over the carrier bead and its advisable to use a smidge of glue to hold them in place, some even suggest using two sided tape. You can then assemble your stitched Carrier beads together to make necklaces and bracelets, check pinterest for ideas!
It's becoming popular to make peyote strip patterns for Carrier beads and you can find them on Etsy or Pinterest.
I love the colors, feel, and quality of the glass carrier beads, much better than the acrylic versions made in China. And even though they are glass they really don't weigh that much, each bead averages 1.2 grams so a whole necklace of them would weigh 36 grams, just over an ounce, not heavy at all.
It take about 15 beads to make a bracelet, and 30 to make a necklace.
They measure 9x17mm each.