Guide · 1368 words
Choosing wooden building blocks: systems, piece counts and carton maths
Most block orders start with a number: "we need a 50-piece set". The number is the last decision, not the first. A block set is a system of shapes with fixed relationships, and the relationships decide what a child can build. Get the system right, and the piece count follows from the shelf space, the price point and the age band you are buying for.
Start with the system, not the piece count
Unit blocks are the clearest case. Every piece is a fraction or a multiple of one standard unit, commonly a 40 mm cube, sometimes 25 mm or 50 mm. Half units, double units, pillars, roof planks, Roman arches. Because the sizes relate, a four-unit plank spans two columns exactly and a ramp sits flush on a unit cube. Take the arch out and the set still builds. Take the half units out and half the structures stop working.
Coloured blocks are usually a looser set: cubes, planks, cylinders, sometimes arches, painted in four to six colours. They cost less to make, cost less to buy, and are not modular. That does not make them weaker, only different, and bought for a different reason.
| Type | Typical pieces | Main play pattern | Age band | Carton profile |
|---|---|---|---|---|
| Unit blocks, natural | 20 to 100 | Building to scale: towers, bridges, enclosures | 3+ | Dense; one or two sets per carton |
| Coloured cube and plank sets | 12 to 60 | Sorting, stacking, simple patterns | 12 months to 5 | Light; several sets per carton |
| Plank and board sets | 24 to 48 | Balance, ramps, ball runs | 3+ | Long cartons, slower palletising |
| Construction kits (dowels, bolts) | 30 to 120 | Real assembly with a tool | 3+ | Small parts inside bagged inners |
What the piece count hides
A 50-piece set can mean 50 identical cubes or 50 pieces spread across 12 shapes. The first is a stacking and sorting toy. The second is a construction system. Both get called "50 pieces" on a quote sheet. Ask for the shape breakdown before you compare prices, and ask whether the count includes the storage crate or the cotton bag.
The second number worth asking for is the number of distinct shapes. Twelve shapes in a 40-piece set gives a child options; four shapes gives a pile of the same thing.
Price per piece and carton economics
Blocks are dense. A carton of 50-piece beech sets weighs far more than a carton of soft toys twice its size, and that weight drives your logistics line. Most retail distribution centres cap carton weight for manual handling; 15 kg is a common ceiling in Europe, and marketplaces set their own limits. That cap, not the box dimensions, often decides how many sets go in a carton.
Ask for five numbers with every quotation: carton dimensions in centimetres, CBM, gross weight, sets per carton, and cartons per pallet. With those you can price freight, warehousing and pallet positions without going back to the supplier for a second round.
There is also a fixed cost per set that buyers underestimate: the crate, the label, the insert, the labour for counting and packing. Moving from 30 pieces to 60 usually adds much less than double the cost, because that work stays the same. It is one reason larger sets look like better value on a shelf and a worse one for a first purchase. A wooden crate is part of the product for a gift set and a pure cost for a classroom pack. If it is printed, it also needs the same age and warning text as the toy, so decide early.
Age grading
Both EN71 and ASTM F963 draw the small-parts line at 36 months. Under three, no piece may fit entirely inside the small parts cylinder, and the set must carry the warning. That single test decides more of your range than any marketing consideration.
In practice, we see the bands fall like this:
- 12 to 18 months: four to twelve large blocks, rounded edges, no thin offcuts, no pieces small enough to swallow.
- 18 to 36 months: stacking and simple balance, larger planks, fewer shapes.
- 3 to 5 years: unit blocks, first construction kits, more pieces, smaller cubes.
- 5 years and up: plank and board sets, ball runs, kits with small dowels.
Age marking is a safety statement before it is a sales claim. A test report covering 3+ does not support an 18-month label. Check that the box, the report and your catalogue agree.
Wood and finish
Species choice shows up in weight, edge retention and price, in that order.
Beech is hard and dense, holds an edge after years of play, and sands to a clean radius. It is the default for unit blocks that must stay square. It also makes the heaviest cartons.
Pine is lighter and softer, dents more readily, and takes printing well. It suits oversized blocks for younger children and budget sets with a natural look.
Rubberwood is consistent in colour and medium in hardness, which makes it a good base for painted sets where a flat colour matters.
Birch plywood is stable in thin sections, so it belongs in plank sets, boards and ball-run tracks rather than in cubes.
Finish is water-based paint and ink, tested to EN71-3 for migration of elements. Natural blocks are sanded, with edges broken to roughly a 1 mm radius, and either left unfinished or given a water-based clear coat. Hold the unit dimension to about plus or minus 0.5 mm. Looser tolerances do not show on the shelf; they show up as towers that lean.
What sells, and what sits
The sets that reorder are rarely the spectacular ones. A natural unit block set of 30 to 50 pieces in a plain crate reorders year after year: a known object at a known price. Classroom packs above 100 pieces reorder to schools, where spare parts matter more than presentation.
Coloured sets sell as gifts and as first purchases. They do better in the 24 to 36 piece range, where the set is complete enough to play with and light enough to post.
The sets that sit are usually novelty sets above 150 pieces: they photograph well, weigh a lot, and offer nothing the 50-piece version does not.
If you are building a range, start with one natural construction set, one coloured set for the younger shelf, and one refill pack. Buyers forget the refill pack; it keeps a set in use after the first pieces go missing.
See the build and construct range for the shapes and pack sizes we produce, or read the custom process if the set needs your own branding and carton design.
Key takeaways
- Choose the shape system first, then the piece count, then the price.
- Ask for the shape breakdown and the per-piece price, not only the total count.
- Carton weight caps at retail DCs usually decide units per carton, not box size.
- The 36-month small-parts line is the real age divider in both EN71 and ASTM F963.
- Beech for unit blocks, pine for large blocks, rubberwood for painted sets, birch plywood for planks; hold the unit dimension to about plus or minus 0.5 mm.
FAQs
How many pieces should a first block set have?
Between 30 and 50 for the three-plus shelf. Below 30 the set runs out of structural options quickly; above 50 the price point starts to work against a first purchase and the carton gets heavy.
Are coloured blocks worse than natural blocks?
No. They are a different product: coloured sets suit sorting, colour naming and gift packaging, while natural unit blocks suit open-ended construction.
Can you match a competitor's block set?
Usually, if it is a standard shape system. Send the dimensions and the shape list. If it uses a non-standard unit, we can cut new profiles, which changes the MOQ and the sample timeline. Details are on the custom page.
What is the MOQ on block sets?
Typically 20 pieces per model for catalogue items, and mixed cartons are possible. New profiles carry higher minimums because of cutting setup and packaging print runs.
Need a quotation? Send the product, quantity and destination market — we reply within 12 working hours.