Our Tiny Balsa -n- Spools has balsa slats through out this toy and each measures 1/8" thick x 1/2" wide x 1.5" long. The spools measure 3/8" high x 3/8" diameter and the wooden wheels measure 3/4" dia. x 3/16" dia. Pony Beads at top and bottom of toy and has colored raffia paper tied in between each area. The overall toy measures approx. 7" long x 3" wide. Comes with one nickel plated pear shaped quick link for hanging. Good for birds from finches, canaries, lovebirds, parakeets, parrotlets and alike.