Technical Details about wood blocks
If you plan to add to an existing set of blocks, measure them first. If you need help email us at woodentoysplus@gmail.com.  View Hard Maple Block Kits (click here).

Size
These blocks are cut on a 1-3/8 inch modulus: the common standard for school size blocks. The rectangles are 1-3/8 inch thick by 2-3/4, 5-1/2, 11, and 22 inches long. The standard Unit Block is the mid-sized rectangle which is 1-3/8 by 2-3/4 by 5-1/2 inches. Blocks are made in many different sizes, but this is the most common standard. Kits include Rectangles, Triangles, Road Planks, Roof Planks, Arches, Columns, and various other shapes. In addition to Blocks, kits contain Square Columns, Round Columns, Wide Planks, and Narrow Planks. All of the dimensions of these pieces are some multiple of the basic metric; this is what lends Unit Blocks their usefulness as an educational toy.

Profiles
Blocks are 1-3/8 by 2-3/4 in cross section( ). 
Square columns are 1-3/8 by 1-3/8 in cross section ( ). 

Road Planks are 11/16 by 2-3/4 in cross section ( ).

Roof Planks are 11/16 by 1-3/8 in cross section ( ). 

All of these profiles are chopped to lengths of 1-3/8, 2-3/4, 5-1/2, 11, and 22 inches. 

Materials
Maple is one of North America's premier hardwoods. It varies in color from almost white to a reddish brown, and is noted for varying patterns such as Curly Maple or Tiger Maple. Its fine grain makes it virtually splinter free and it is very hard which prevents dents and damage from rough play. It may be white or tan, or it may be white and tan together. This is the block for the customer that wants traditional hardwood blocks. The blocks we manufacture are made from high quality, knot free, kiln dried Michigan and Indiana Maple and we inspect each block individually for flaws and defects. Blocks are rounded on the long edges and sanded and softened on the ends and corners. Tolerances are within .01 inches. Our blocks are guaranteed against cracking or checking and we will replace defective blocks free of charge.

Wear and Tear
The initial pleasure for most children being the assembly of towers that provide a satisfying crash when they collapse, all blocks suffer from rough treatment, but Maple Blocks will shrug off the abuse that would destroy Pine or other economy woods. Moreover, children play with blocks for many years, and a good set has to survive both time and siblings (not to mention probate). Our blocks are almost indestructible and will last for generations (as you may already know if you are giving away your childhood blocks to someone you love).

Finish
These blocks are carefully sanded, and are unfinished, with blunted edges and corners.  Oil finishes or painted blocks are avoided because younger children tend to put blocks in their mouths and some finishes are toxic.

All blocks are totally unfinished and completely free of chemicals, paint or insecticides. The blocks are the same size and the contents of the kits are identical.

Safety
These blocks are tested by an independent laboratory to conform to the standards of the CPSC and CPSIA, and are recommended for children 3+. As with any toy, children should occasionally be monitored for unsafe practices. The most serious of these consist in throwing the blocks at others or hitting pets or furniture with them as with a club. Round blocks such as columns should be put away to avoid accidental falls. Blocks should occasionally be checked for splinters, but splinters are a very rare hazard. New blocks may have nibs or frass at the edges, but this is harmless and will soon fall off. Broken blocks should be thrown away (we will supply a new one free of charge). The blocks are unfinished wood. 

Contents of Wooden Unit Block Kits

Size		Picture				Kits
Blocks	Type	end/front	10811	21211	31711	42711	53111	64911	76711
1-3/8 by 2-3/4 by 22	Quad Unit Rectangles							2	4
1-3/8 by 2-3/4 by 11	Double Unit Rectangles				2	2	4	8	12
1-3/8 by 2-3/4 by 5-1/2	Unit Rectangles		2	2	6	6	10	18	26
1-3/8 by 2-3/4 by 2-3/4	Half Unit Rectangles		4	4	6	8	10	18	26
1-3/8 by 1-3/8 by 11	Double Unit Columns
1-3/8 by 1-3/8 by 5-1/2	Unit Columns		2	2	2	4	4	4	4
1-3/8 by 1-3/8 by 2-3/4	Half Unit Columns		4	4	4	8	8	8	8
1-3/8 by 1-3/8 by 1-3/8	Cubes		8	8	8	16	16	16	16
Road Planks
11/16 by 2-3/4 by 11	Double Unit Road Planks
11/16 by 2-3/4 by 5-1/2	Unit Road Planks			4	4	8	8	8	8
11/16 by 2-3/4 by 2-3/4	Half Unit Wide Road Planks			8	8	16	16	16	16
Roof Planks
11/16 by 1-3/8 by 11	Long Narrow Roof Planks			2	2	4	4	4	4
11/16 by 1-3/8 by 5-1/2	Med. Narrow Roof Planks		4	8	8	16	16	16	16
11/16 by 1-3/8 by 2-3/4	Short Narrow Roof Planks		8	8	8	16	16	16	16
Arches & Buttresses
1-3/8 by 2-3/4 by 5-1/2	Roman Arches			1	1	1	1	2	3
1-3/8 by 4-1/8 by 2-1/16	Semi-circles			1	1	1	1	2	3
1-3/8 by 2-3/4 by 5-1/2	half arch					1	1	2	3
1-3/8 by 1-3/8 by 4-1/8	round buttress					1	1	2	3
Triangles & Ramps
1-3/8 by 2-3/4 by 2-3/4	2-3/4 triangles		4	4	4	8	8	8	8
1-3/8 by 2-3/4 by 5-1/2	1-3/8 Unit Ramps					2	2	2	2
Columns
1-3/8 by 5-1/2	Unit Round Columns							4	8
1-3/8 by 2-3/4	HU Round Columns		4	4	4	4	4	4	4
		Totals	40	60	68	122	130	160	190
		Shapes	9	14	15	18	18	20	20
			10811	21211	31711	42711	53111	64911	76711