What Is a Size Set (Seri)? Turkish Wholesale Explained

Almost every new buyer meets the word seri in the same way: a supplier sends a price, the buyer assumes it is per piece, and the proforma comes back at six times what they expected. A seri — a size set — is the single most important piece of vocabulary in Turkish wholesale, because it changes both what you pay and what arrives. This guide explains what a size set actually is, why factories work that way, how to read a quote correctly, and when buying by set helps you rather than hurts you. Disentis Modest has produced in our own Istanbul workshop since 1998 across 600+ models in sizes 34⁠–⁠60, so this is the vocabulary we use with buyers every day.

What a "Seri" Actually Is

A seri is one model, sold as a fixed bundle of sizes, in a fixed ratio, as a single purchasing unit. You are not choosing sizes — you are buying a pre-decided spread. If a dress is sold as a 6-piece seri of 46-48-50-52, the set contains one 46, two 48s, two 50s and one 52. You buy the set, not the sizes inside it.

• It is a unit of sale, not a unit of pricing. The price you are quoted may be per piece or per set — and the difference is the whole misunderstanding.
• The ratio is fixed by the supplier, usually weighted toward the middle sizes because that is where demand concentrates.
• You cannot normally split it. "Seri bozulmaz" — the set is not broken — is a phrase you will meet often.
• One model per seri. A set is never a mix of styles; it is depth in one style across sizes.
• Colour is usually fixed too. A seri is typically one model in one colour; a second colour is a second seri.

The Common Turkish Size-Set Formats

There is no single national standard, but a handful of formats cover most of the plus-size market. Read the two numbers together: the sizes included, and how many of each.

• 4-piece set (4'lü seri): 46-48-50-52, one of each. The smallest common unit, popular for higher-priced outerwear.
• 5-piece set: 46-48-50-52-54, one of each. Common where demand is spread evenly.
• 6-piece set (6'lı seri): 46×1, 48×2, 50×2, 52×1. The workhorse format — depth in the two sizes that sell most.
• 8-piece set: 46-48-50-52-54-56 with doubles in 50 and 52. Used on fast-moving dresses and jersey pieces.
• Extended plus set: 50-52-54-56-58-60, weighted to the middle. Common for buyers in markets where demand skews larger.
• One size / free size: not a set at all — a single oversized cut that covers roughly 46⁠–⁠52, sold by the piece and often bought in multiples of 3 or 5.

Practical tip: never accept a quote that says only "$16." Ask two questions — is that per piece or per set, and what is the size ratio inside the set. Those ten words prevent the most common ordering error in Turkish wholesale.

Why Factories Sell in Sets: The Cutting-Table Reason

The seri is not a sales tactic. It comes directly from how garments are physically cut, and understanding that tells you when a supplier can flex and when they truly cannot.

• Fabric is cut in a lay, not one garment at a time. Forty to sixty plies of fabric are stacked, and a single marker — the paper or digital plan of pattern pieces — is laid over the whole stack and cut once.
• The marker contains a full run of sizes. Nesting a 46 next to a 52 fills the gaps that a single size would waste. That is where marker efficiency comes from, and it is worth several percent of fabric on every style.
• One cut produces sets, not sizes. If the lay is 50 plies and the marker holds one set, the cut yields 50 sets — which is why the natural unit coming off the table is a set.
• Breaking sets creates orphans. If ten buyers each take only size 50, the factory is left holding 46s and 54s it cannot sell. That imbalance is the real cost behind "seri bozulmaz".
• Stock producers have more freedom. A workshop that cuts to stock — rather than only to order — already holds individual sizes in the warehouse, so it can pick and mix without disturbing the cutting plan.

How to Read a Size-Set Quote Correctly

Work through it in the same order every time and the arithmetic never surprises you.

• Step 1 — establish the unit. "$16 per piece, 6-piece seri" means the set costs $96. "$96 per seri" means the same thing. "$16 per seri" would be extraordinary and is almost certainly a misunderstanding.
• Step 2 — write out the ratio. 46×1, 48×2, 50×2, 52×1. If the supplier will not state it, treat that as a warning sign.
• Step 3 — multiply to your budget. Three sets of that dress = 18 pieces = $288. Against a $400 minimum, you now know exactly how much room you have left.
• Step 4 — check the colour rule. Two colours of the same dress usually means two sets, not one set split across colours.
• Step 5 — ask about the set-breaking premium. Some suppliers will break a set for 5⁠–⁠10% more per piece. If you only need three sizes, that premium is often cheaper than carrying two sizes you cannot sell.

When a Size Set Helps You — and When It Hurts

The set is not inherently good or bad. It is a good fit for some buying situations and a bad fit for others.

A set works well when

• You are reordering a proven model. You already know it sells across sizes, so a fixed ratio is exactly what you want.
• You have no size data yet. A supplier's standard ratio is a reasonable first guess — it reflects what sells across their whole customer base.
• You want the lowest possible price per piece. Sets are the factory's most efficient unit, and pricing usually reflects that.
• You are buying co-ord sets or fast-moving basics where the middle sizes turn quickly and the outer sizes are not dead weight.

A set works against you when

• Your market skews large or small. If 90% of your customers are 52⁠–⁠58, a 46-48-50-52 set leaves you with unsellable stock in your smallest sizes.
• You are testing a new style. Testing is about breadth of models, not depth of sizes you have not validated.
• Your budget is small. On a $400 minimum, three sets of one coat can consume most of your order and leave you with a single style to sell.
• The piece is expensive. The higher the unit price, the more a forced size you do not need costs you in tied-up cash.

Practical tip: multiply your unsellable-size risk before you buy. On a 6-piece set at $30, one size you cannot sell is $30 of dead stock — about 19% of that set's value. On a $9 t-shirt set, the same mistake costs you $9. Buy sets loosely at the bottom of your price range and tightly at the top.

Sets Versus Your Own Size Curve

A size set is the supplier's curve. Your size curve is yours — the ratio that matches the women who actually walk into your shop. Early on, borrowing the supplier's curve is sensible. After one or two sell-throughs, yours will be better, because it is built on your own data.

• Track what empties first. The size that sells out in month one is the size to double in month two, regardless of what the standard set says.
• Move the whole curve, not the width. If you are selling out of 54 and sitting on 46, you do not need seven sizes — you need the same four sizes shifted up to 50-52-54-56.
• Stretch fabrics let you run narrower. Jersey and viscose cover a wider body range, so three sizes can do the work of four and free budget for another style.
• With us, mixing is allowed. You can combine any models across categories and any sizes within 34⁠–⁠60, as long as the total reaches the $400 minimum order. Build your list on the collection page, then send it on WhatsApp to +90 555 336 47 86; you receive stock confirmation and a proforma invoice, and pay by bank transfer, commonly 70% deposit and 30% before shipping. We ship worldwide.

Everything is cut and sewn in our own Istanbul workshop, which is the practical reason the sizing stays consistent whether you buy a full ratio or your own curve: a 52 in one model comes from the same block as a 52 in the next. The seri exists for good manufacturing reasons — but once you know your customer, the right ratio is the one you choose, not the one that comes off the cutting table.