Short answer
Denim weight is measured in ounces per square yard (oz) or grams per square meter (GSM). Lightweight denim (8–10 oz / 200–280 GSM) is used for shirts and dresses; mid-weight (11–13 oz / 350–440 GSM) for standard jeans; and heavy-weight (14+ oz / 470+ GSM) for rigid, durable workwear jeans.
When sourcing denim rolls from mills in Ahmedabad:
Tell us what you're looking for and we'll point you to the right market or supplier.