Super 120s vs 150s: What a Shop Should Stock

A shop we work with called in early September with what sounded like a simple instruction. A client had come in asking for "Super 150s" by name, having seen it on a competitor's swatch card, and the owner wanted to move the whole core range up to match it for the new season. Same construction, same weight band, just a higher number on the ticket. We asked what the client actually did for a living and how often he planned to wear the suit. He was in property, five days a week, one suit doing most of the work. That answer changed the conversation, because a Super 150s cloth was not going to survive what he needed it to survive, whatever the ticket said.

The Super number gets treated as a quality dial that only moves in one direction: higher is better, so stock the highest one you can sell. It is not a quality dial. It is a measure of one thing, yarn fineness, and past a certain point that fineness starts trading away the durability a daily suit actually needs.

What the Super number is actually measuring

The Super "S" scale follows a definition set by the International Wool Textile Organisation, and it measures fibre diameter alone. Super 100s runs roughly 18.5 microns. Super 120s comes in around 17.5. Super 130s sits close to 17. Super 150s is finer again, around 16.5. Each step up the scale is roughly half a micron thinner than the one before it, and thinner fibre feels softer against the skin, drapes more fluidly, and photographs beautifully on a hanger.

None of that is a claim about weave, about weight, or about how the finished garment behaves after fifty wears. A well-finished Super 100s in a good weave will outlast a poorly chosen Super 150s in daily rotation, because the number on the ticket answers exactly one question and a shop's client is usually asking a different one.

Where durability turns the corner

Fineness and durability move in opposite directions once you pass roughly Super 120s, and that is not a marketing line, it is how a thinner fibre behaves under repeated stress. A coarser yarn has more body to absorb the friction of a normal week: sitting, walking, a briefcase strap across the shoulder, a dry clean every few weeks. A finer yarn gives up some of that resilience for the softer hand, and the trade only gets steeper as the microns come down.

That is why we would put a client's five-day suit in something between Super 100s and Super 130s, not above it. Super 130s to us is not a compromise stopping point, it is the number on our own held book where softness and weekly durability are still in balance. Above that, a suit still looks and feels exceptional in the fitting room. It creases sooner, shines sooner at the seat and elbow, and asks for a gentler rotation than most clients actually give a suit they wear for work.

What we hold, and what adds a mill's own clock

Vitale Barberis Canonico's Four Seasons book is one of two mills we keep cut and ready in our own atelier in Shanghai, the other being Zegna. Forty styles, Super 100s to Super 130s, sitting in a roughly 240 to 280 gram year-round weight, which puts it inside the wider band where most of what we cut actually sits: across the 822 fabrics we hold with a stated weight, 597 sit between 240 and 300 grams, out of a full range that runs from 98 grams up to 440.

Super 130s is the top of that held book. It is not a marketing ceiling, it is the honest edge of what sits on our own shelf, running through our standard 14 days in production from a confirmed order, plus shipping, from a one-piece minimum. A Super 150s or finer bunch is a different order entirely. We do not hold it, and asking us to spec it means ordering against a confirmed bunch and reference from elsewhere in our supplier directory of 33 mills and merchants, 26 of them in Europe, with that mill's own release time sitting on top of our own clock rather than inside it. We set out the mechanics of that gap in more detail in held versus ordered-in cloth, and the same rule applies to any bunch finer than what we keep in Shanghai.

The wool market makes a finer bunch a moving target

This is worth flagging before a shop promises a client a Super 150s order on the strength of last season's swatch card. Australia's Eastern Market Indicator closed the week of 25 September 2026 at 1,845 Australian cents per kilogram, down from a high near 1,890 earlier in the month but still 19.7 percent above where the year opened, according to woolnews.net's market report for that week. The same report shows individual micron price guides moving in different directions within the same session, some finer categories gaining while broader ones fell.

That divergence matters more for a Super 150s bunch than a Super 130s one, because the finer end of the market is the part moving hardest right now. A length that was easy to reorder in spring can tighten by autumn, and a shop that promises a finer special-order bunch as if it were always available is making a promise the mill itself cannot always keep. Check the specific bunch before a deposit goes down, the same habit we push on any special order regardless of the fineness written on the swatch.

Building the core range: what goes on the rail

Run this before deciding what a shop holds as open stock and what it only orders once a specific client has asked for the name.

• Hold Super 100s to Super 130s for the core range. It covers a client's daily suit without asking a delicate yarn to do a job it was not built for, and on VBC's Four Seasons book it runs through our standard 14 days without a mill's own release time added on.
• Spec Super 150s and finer as an occasion piece, not a daily suit. Save it for the client who already owns a workhorse suit and wants something for the few times a month that suit does not need to leave the wardrobe.
• Match the Super number to the rotation, not the request. A client asking for a number by name is asking for the feel he saw on a swatch, not the fineness figure itself, and it is worth asking how many days a week the suit will actually be worn before quoting either.
• Ask for a release estimate on any Super 150s or finer bunch before promising a delivery date, since none of it sits on our own shelf and the mill's own clock runs before ours starts.
• Do not hold a finer bunch as open stock on a guess. A length sitting unsold for months is a cost a shop pays for a number on a swatch card, not a spec a client actually asked for.

Neither number is the wrong answer

Super 120s and Super 150s are not competing for the same client. One is built to survive a working week without complaint. The other is built to feel exceptional for the handful of times it leaves the closet. A shop that understands which is which can put both in front of a client honestly, instead of treating the higher number as the better sale.

We cut and sew every order in our own atelier in Shanghai, under our own 200 house tailors, from a one-piece minimum, in 14 days in production plus shipping. If you are deciding where Super 150s or a finer bunch belongs in a shop's range, or want to know what we can turn around from our own held stock versus what needs a mill's release time first, send us the bunch you are considering and we will tell you which clock it runs on before you quote a client a date.