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Homeschool Montessori

Geometric Cabinet

The geometric cabinet is a six-drawer wooden chest of about 35 plane shapes, each in its own frame, for children of about 3 to 5. It costs $179.95 to $542.65 at the US sellers we checked on October 5, 2026. Card shapes cut and traced at home cover the first lessons, and the cabinet can wait.

By Owen WrenLast updated

The first lesson with it is Geometric Cabinet (Plane Geometric Insets). Not sure your child is ready for it? Two minutes of questions place your child on the sequence.

At a glance
AreaSensorial
Used in
From age3 to 5 years
Make itHard to make accurately
Buy itAbout $180 to $543 (noted )
Montessori geometric cabinet, six drawers of geometric insets, Fig. 16 in Dr. Montessori's Own Handbook, 1914
From Dr. Montessori's Own Handbook (1914)Fig. 16, the cabinet with drawers to hold the geometric insets, as printed in Dr. Montessori's Own Handbook (1914). Public domain.
Montessori geometric cabinet cards, three series of shape cards, Fig. 25 in Dr. Montessori's Own Handbook, 1914
From Dr. Montessori's Own Handbook (1914)Fig. 25, the series of cards with geometric forms, as printed in Dr. Montessori's Own Handbook (1914). Public domain.

What the geometric cabinet is for

Each drawer holds one family of shapes. One holds circles of six sizes, another a square with five rectangles, another triangles; the rest hold polygons, curved figures and four-sided shapes. The child lifts a shape out, traces it and its frame with two fingers, and puts it back. A shape fits only its own frame.

Montessori described this material in 1912 and 1914, with the same drawers, a tray for the first lessons and three series of cards. Modern cabinets keep her six drawers and her families of shapes.

Parts of the geometric cabinet
PartWhat it looks like
CabinetSix drawers. Alison's is 18.5 by 13 by 9.25 inches
ShapesMontessori Outlet's 35: six circles, six rectangles, seven triangles, six polygons, four curved figures, six quadrilaterals, one blank frame
ColorsBlue shapes; frames vary by maker. Alison's are brown, and Nienhuis lists blue and yellow
Demonstration trayHolds six frames for the first lessons; sold separately by Nienhuis
CardsThree series, filled, thick outline and thin line, sold separately by most makers

The lessons that use the geometric cabinet

  • Geometric Cabinet (Plane Geometric Insets)

    3 to 5 years

    Lifting flat wooden shapes out of their frames, tracing each edge with two fingers, and fitting them back, from three contrasting shapes to drawers of near twins.

Buying one: 4 listings checked October 5, 2026

Prices checked October 5, 2026
Seller and setMade ofPrice
Montessori OutletGeometric Cabinet (510300240)Six drawers, 35 insets and frames. Market price shown $532.00. In stock.Not stated$179.95
Alison's MontessoriGeometric Cabinet (S38)Sale price; regular $254.00. Six drawers, 35 frames and insets with large knobs. 18.5 by 13 by 9.25 inches. Made in Thailand.Rubber wood; brown frames, light blue insets$228.60
NienhuisThe Geometric Cabinet (003700)Six drawers, 35 insets and frames. US store price.HDF, beech, beech plywood$542.65
The Montessori RoomGeometric Cabinet (A100)Canadian store. Sold as a budget version: six drawers, 36 insets and frames, 48 by 33 by 25 cm, assembled.Beech$279.99 CAD
Prices read on each seller's page on , before shipping and tax. They change often; check the seller's page before you buy. None of these links earn us anything.
  • Montessori Outlet's cabinet at $179.95 has the same 35 shapes as Nienhuis's at $542.65. Check that every shape drops into its frame without sticking.
  • The first weeks need only three shapes. Nienhuis sells the demonstration tray on its own, and card shapes from the build below do the same job.
  • Control charts and the three series of cards are sold separately, from about $6 for a chart. The cards are easy to make.
  • Montessori Services didn't sell a geometric cabinet when we looked.

Making the geometric cabinet at home

What to gather

  • Thick blue card or 3 mm craft plywood for the shapes
  • White card for the frames and the three card series
  • A compass and a ruler, plus a protractor for the triangles
  • A craft knife and a cutting mat
  • Small wooden beads and glue, for knobs
Cut list
PieceSize and markingHow many
Frames14 by 14 cm white card, two layers, the shape cut from the top layerOne per shape
ShapesBlue, about 10 cm across: circle, square, triangle to start3, then up to 6
Cards14 by 14 cm white: filled shape, 1 cm outline, thin black line3 per shape
  1. 1Draw each shape about 10 cm across on blue card and cut it out cleanly.
  2. 2Trace it onto the top layer of a frame card, cut the opening, and glue the top layer onto a plain backing card.
  3. 3Glue a bead to the middle of each shape for a knob.
  4. 4Make three cards per shape: one with the shape filled in blue, one with a 1 cm blue outline, one with a thin black line.
  5. 5Check that each shape drops into its own frame and into no other.

Keeping a full set on the shelf

  • Keep the drawers closed and the cabinet level. A drawer pulled out too far drops six shapes.
  • Glue loose knobs at once. A child will pry a knobless shape out by its edge and chip the frame.

Questions parents ask about the geometric cabinet

How many shapes are in a Montessori geometric cabinet?

Usually 35 in six drawers, plus a blank frame. Each drawer holds one family, such as circles or triangles. The Montessori Room's budget cabinet has 36.

Do I need the whole geometric cabinet?

Not at first. The opening lessons use only three contrasting shapes. Buy or make the tray first, and add drawers when the child places contrasting shapes with ease.

Is the geometric cabinet in Montessori's own books?

Yes. The Montessori Method (1912) and Dr. Montessori's Own Handbook (1914) both describe a cabinet of six drawers of plane insets, a tray for the first lessons and three series of cards.

Before the geometric cabinet, make sure the work before it is solid. The knobbed cylinders lesson lists the signs that a child is ready to move on.