11/0 is considered the standard-sized seed bead. They are larger than 15/0 beads, and smaller than 8/0 beads.
11/0 STANDARD is 2.1mm 11/0 MIYUKI is 2.0mm 11/0 DELICA is 1.6mm
All are marketed as 11/0 beads.
Silver Lined Beads are not washable.
Please note the 100-gram bag of purple is less red than the smaller packets.