7 mm individual beads. This set comes with 55 of each 1-10 beads.
Mathematics Beads - Canada
Decanomial Bead Squares Montessori materials
Price: $100 - $200
Montessori Materials: Decanomial Bead Box (55 in a box) (7MM)
Bead Decanomial with box (LJMA083) by Leader Joy Montessori USA
Review of Alison's Montessori Geometric Solids, Constructive
Bead Decanomial - Montessori Eductional Materials Nepal
Bead Decanomial - Montessori Eductional Materials Nepal
Review of Alison's Montessori Geometric Solids, Constructive
Price: $100 - $200
Alphabet Square Beads, 7mm by Bead Landing™
Montessori Materials: Decanomial Beads Box Only (Premium Quality)
Montessori Materials: Decanomial Bead Box (55 in a box) (7MM)
Mathematics Beads - Australia
Montessori Math Materials Bead Decanomial with Box, 1-10 Color