These are yellow and blue Millefiori trade beads.  Millefiori trade beads were made in Venice at the end of the 19th century.  On average each bead measures 18 mm long with a diameter of 7 mm.  The end of each bead is smooth but many have an abnormal end which is not totally flat.  The shape of the bead is slightly curved.  Sold by the bead.