7 mm individual beads. This set comes with 55 of each 1-10 beads.
Montessori Materials: Decanomial Bead Box Complete Set(Premium
Bead Landing Alphabet Square Beads - each
DIY Montessori Math Beads
Montessori Math Materials Bead Decanomial with Box, 1-10 Color
PACKAGE::A wooden compartment box contains 55 sets of the colored bead bars 1-10, 1 type of 55, a total of 550, 2 number of beads card THINKING
Montessori Math Materials Bead Decanomial with Box, 1-10 Color Beaded Stick Checker Board Beads(15 * 15 * 1.77Inch)
This material can be used for many different activities, also in combination with other materials.
DECANOMIAL BEAD BOX
Decanomial Bead Bar Box (N Beads) - IFIT Montessori
Bead Decanomial - Montessori Eductional Materials Mauritius
Montessori Math Materials Bead Decanomial with Box, 1-10 Color