GSM vs Thread Count


It’s been a very hot summer in Sydney, and I’ve been looking at getting new bed sheets for me to sweat through. When it comes to choosing quality bedding, people are often bombarded with technical terms that can be confusing and overwhelming. Two commonly used terms in the world of sheets and blankets are GSM (grams per square meter) and thread count. While both can be indicators of quality, they represent different aspects of the fabric. In this article, we will untangle what each is and clarify what they mean, so that you can make informed decisions when selecting the ideal bedding for a comfortable night’s sleep.


GSM, or grams per square metre, is a measurement of the weight of a fabric per unit area. In the context of bedding, it provides an indication of fabric thickness and how heavy the material is. Simply put, the higher the GSM, the denser and more substantial the fabric. In this way, knowing the weight in grams can help you compare two fabrics. 

For example, a sheet set with a higher GSM might be more suitable for colder climates or individuals who prefer a warmer and cosier feel. Heavy winter blankets and comforters often boast a high GSM to provide ample insulation and retain body heat. On the other hand, lightweight and breathable sheets for summer use typically have a lower GSM to ensure comfort during warmer nights.

Understanding  the GSM scale can help you in selecting the right type of fabric for your bedding preferences, taking into account your specific tastes and seasonal requirements. Common ranges include:

  • Light GSM (100-200): Ideal for warm climates and summer nights, providing breathability and a cool feel. Think hot and humid 40°C Australian summers.
  • Medium GSM (200-400): Versatile for year-round use, striking a balance between warmth and breathability.
  • Heavy GSM (400+): Suited for colder climates or those who enjoy the added weight and warmth of a heavier fabric.

Thread Count

Thread count, on the other hand, measures the number of horizontal threads and vertical threads per square inch of fabric. Traditionally considered a benchmark of quality, the number of single threads in the piece of fabric is often associated with the perceived softness and durability of bedding. However, it’s essential to debunk the myth that a higher thread count always translates to a luxurious fabric.

A common misconception is that a higher thread count automatically means superior comfort. While a high thread count can contribute to a smoother texture, the quality of the fibers and the type of weave are equally important. Unfortunately there is no industry standard, so some manufacturers may use double- or triple-ply threads (two or more individual threads twisted together) to artificially inflate thread count numbers, but this doesn’t necessarily enhance the overall quality of the fabric.

In reality, while there is no ideal thread count, a good range for comfort and durability is generally considered to be between 200 and 800 threads per square inch. Sheets within this very large range offer a good balance of softness, breathability, and longevity. Beyond this range, diminishing returns are common, and the number of individual threads becomes a less reliable indicator of quality.

Choosing the Right Combination

Understanding both GSM and thread count is crucial for selecting the perfect bedding that suits your preferences and needs. The interplay between these two factors determines the overall feel, weight, and performance of your sheets, duvets and duvet covers, and pillowcases.

For example, a high thread count paired with a low GSM might result in a lightweight, silky sheet that’s perfect for warmer weather. On the other hand, a lower thread count with a higher GSM could produce a thicker, more insulating fabric suitable for cooler temperatures.

It’s essential to strike a balance based on your personal preferences, climate, and the intended use of the bedding. For instance; 

  1. Hot Summers:
    • Ideal combination: Low GSM + Medium Thread Count 
    • Reasoning: Lightweight fabric for breathability, with a moderate thread count for a soft feel.
  2. Year-Round Comfort:
    • Ideal combination: Medium GSM + Medium Thread Count
    • Reasoning: Versatile fabric weight for various temperatures, coupled with a balanced thread count for durability.
  3. Cold Winters:
    • Ideal combination: High GSM + Medium to High Thread Count 
    • Reasoning: Heavyweight fabric for insulation, with a higher thread count for a luxurious feel.


Understanding GSM and thread count helps you choose the right kind of materials for your bedding to suit the temperature of your environment. While GSM reflects the weight and thickness of the fabric, thread count measures the density of threads woven into each square inch. While you shouldn’t stress over the perfect thread count, finding the right balance means that your bedding not only looks luxurious, but is also comfortable and durable. Now go forth, and navigate the world of quality sheets and blankets with confidence, creating a cozy haven that you can relax in when it’s time to sleep!

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