In the context of material weight, oz stands for ‘ounces per square yard’.
As an example, if a material of size four yards squared weighs 20 oz, then the ‘fabric weight’ will be 5 oz (20/4).
|Very light||2.5 oz+||Jacket linings, undergarments and lightweight performance wear.|
|Light||4 oz+||Regular and lightweight shirts.|
|Light||6 oz+||Thick or heavyweight t-shirts.|
|Medium||7 oz+||Light and medium weight sweatshirts, light suits and blazers.|
|Medium||9 oz+||Heavy weight sweatshirts|
|Heavy||12 oz+||Heavier cloths, such as flannel and denim jackets.|
|Very Heavy||14 oz+||Extra thick sweatshirts, woven outerwear, or sports coats made of thick material.|
2.5 - 4oz (Very Lightweight)
Cloths in this category are very light, and are usually very breathable, making them great for summer.
4 – 7oz (Lightweight)
Clothing made of lightweight material can potentially be worn all year round. For example, a t-shirt can be worn during the winter, given correct layering.
7 – 9oz (Medium)
Slightly heavier/lower-midweight. Includes ‘linen’ as a material, which is known for producing light weight variants of traditionally heavy clothing, such as suits and blazers.
9 – 11 oz (Medium)
Transitional garments that are appropriate to wear in the Spring and Fall. Could potentially be worn year round, though it will be on the lighter side.
11oz – 12oz (Heavy)
Can be worn all year round. Heavier or lighter fabrics may be better for certain seasons, but 11-12oz is usually safe and appropriate for general wear.
12oz – 14oz (Heavy)
Fabrics that weigh between 12-14 ounces are considered ‘heavier fabrics’, and are most suitable in the winter. Usually heavy enough to insulate, but still maintain maneuverability without being too bulky.
14oz+ (Very Heavy)
The heaviest category of cloth weight which is generally used for outerwear, such as overcoats, or upholstery. It is insulating, and generally doesn’t let in a lot of air.