Chapter 06
Set Quantities With the 60/30/10 Buy:
Here’s the depth rule at the heart of the sell-through grid. Of your total AW units:
Here’s the depth rule at the heart of the sell-through grid. Of your total AW units:
60% CORE
30% SEASONAL
10%
Core proven, carry-over safe Seasonal proven style, seasonal execution Test unproven
Note what’s being split: units, not styles. This is the distinction almost everyone gets wrong.
A range of four styles can easily be a 25/25/25/25 buy-by unit, which means you have committed a quarter of your cash to a test.
Why 60 for Core:
Because that’s roughly the share of your season that is predictable.
Your proven pullover in black will sell. You know it will sell.
The only question is whether you have enough of it in September and enough of it again in December.
Under-buying Core is the quiet killer: you don’t see the loss because you sold out. You just never find out what you could have sold.
Why 30 for Seasonal?
Seasonal is proven-style, unproven-execution. The block works; the color or the lining is the variable.
Thirty percent is enough to make the range feel new and give you something to market, without betting the season on a color that photographs better than it wears.
Why only 10 for the test?
Because a test you can’t afford to lose isn’t a test. At 10% of units, a complete failure is an annoying write-off.
At 30%, it’s a cash-flow event that stops you reordering the thing that is working.
Our MOQ is 50 pieces per style, which means a test costs you 50 units and a real answer. That’s the cheapest market research in apparel.
Splitting depth across colors:
That a colorway is not a style and that adding a color reuses the pattern and sample while adding a style costs a full development cycle is a fundamental concept we cover on the product-range pillar.
What’s specific to the cold season is the split itself: two colors per style is the default, three only for your Core anchor, and you skew hard to a dark lead, a rough 60/40 on two, 50/30/20 on three.
Black or your darkest neutral is nearly always the AW lead, because winter shoppers buy dark.
Spread four colors evenly, and depth leaks out of the very piece that would have sold.
A worked example: a 1,000-unit AW buy
Percentages are easy to nod along to and hard to actually apply.
So here’s the arithmetic, end to end. This is an illustrative buy, not a client’s numbers swap in your own total, and the structure holds.
Say your budget supports 1,000 units across the season.
The 60/30/10 split gives you 600 Core, 300 Seasonal, and 100 Test. Now push those through the Grid.
| Style |
Weight |
Role |
Units |
Colours & split |
| Anchor pullover |
Heavyweight |
Core |
400 |
Black 200 / Charcoal 120 / Bone 80 |
| Layering pullover |
Midweight |
Core |
200 |
Black 120 / Grey 80 |
| Zip-through (same block) |
Heavyweight |
Seasonal |
200 |
Black 120 / Seasonal colour 80 |
| Sherpa-lined |
Lined |
Seasonal |
100 |
Black 60 / Bone 40 |
| Boxy cropped (new) |
Heavyweight |
Test |
100 |
Black 60 / Seasonal colour 40 |
Five styles. Two of them carry 60% of the units. Nothing sits below the 50-piece MOQ, even at the thinnest color.
And the whole test position of the piece you’re genuinely guessing about is 100 units.
If it dies completely, you’ve lost a tenth of the season and learned something you can use for two years.
Now look at what a typical over-ranged version of the same budget does: eight styles at 125 units each, two or three colors apiece.
Every color lands at 40-60 units.
Sell one size band well, and you’re out of stock in week two with nothing deep enough to reorder.
That’s the same money spent to guarantee a thin season.
Working out the actual units behind these percentages means knowing which of your choices sets the floor.
Our breakdown of the hoodie MOQ and what lifts it above 50 maps every minimum a custom color or decoration can trigger.
From the floor:
The buys we see clearly almost always look lopsided on paper. One style carries most of the units.
The brand looks like it “only made a few things.”
Then they sell out of the right things and reorder in November while everyone else is discounting.
Key takeaway:
Split units, not styles. 60% to what you know sells, 30% to a seasonal execution of what you know sells, and 10% to what you’re guessing about.