What Does the “S” Number Mean in Wool Suits? (And Why It Matters)

When you’re selecting a custom suit from Crowned Legacy Suits, you may come across numbers like Super 100s, Super 120s, or Super 150s on fabric swatches. These aren't just fancy terms—they're important indicators of quality, fineness, and performance.

Let’s break down exactly what these “S” numbers mean, and how to choose the right one for your lifestyle.

What Is the “S” or “Super” Number in Wool?

The “S” number (short for Super Number) measures the fineness of the wool fiber used in your suit. It refers to how many times the wool fiber could theoretically be spun across a set length of yarn. The higher the number, the finer and softer the wool.

For example:

• Super 100s: Wool fibers are ~18.5 microns thick.

• Super 150s: Finer, around ~16 microns.

• Super 180s and above: Exceptionally fine and rare.

Quick tip: Higher S-numbers = finer fibers = softer feel
But also = more delicate and often more expensive.

Why the S Number Matters:

Feel & Comfort

Higher S-numbers tend to feel softer and smoother against the skin. If you value a luxurious drape or need all-day comfort, you’ll feel the difference.

Look & Elegance

Fine wool offers a more refined, polished appearance—perfect for business, formal events, or once-in-a-lifetime moments (like weddings).

Durability & Wear

• Lower S numbers (Super 100s–120s) are more durable and ideal for everyday wear.

• Higher S numbers (Super 150s–180s) are more delicate, best reserved for special occasions.

At Crowned Legacy Suits, we’ll guide you to the perfect balance of style and functionality.

How to Choose the Right S Number

S Number Range Best For Key Benefit Super 100s – 110s Everyday business wear Durable, versatile Super 120s – 130s Business + formal occasions Refined, soft, professional Super 140s – 160s Special events, weddings Luxurious drape, elegant feel Super 180s+ VIP events, showpieces Ultra-luxury, very delicate

Your lifestyle and needs will determine which is best. A professional who wears suits often may opt for Super 120s for the best of both worlds. A groom might lean into Super 150s for a softer, standout look on the big day.

Final Thoughts: It’s Not Just About the Number

While S-numbers matter, they aren’t everything. We also consider:

• Weave and weight of the fabric

• Climate and intended use

• Budget and care preferences

At Crowned Legacy Suits, we provide expert style guidance with access to a wide range of luxurious fabrics. Whether you're building a power suit or designing your legacy look, we’ll make sure every detail—down to the microns—is on point.

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