The weight and thickness standards of tarpaulins can vary depending on the specific type and intended use. However, here are some general guidelines regarding tarpaulin weight and thickness:

1. Weight: Tarpaulin weight is typically measured in ounces per square yard (oz/yd²) or grams per square meter (gsm). Light-duty tarps generally range from 3 oz/yd² to 6 oz/yd² (100 gsm to 200 gsm), medium-duty tarps range from 7 oz/yd² to 10 oz/yd² (240 gsm to 340 gsm), and heavy-duty tarps can range from 11 oz/yd² and above (375 gsm and above). These weight ranges are approximate and may vary based on the manufacturer and specific product.

2. Thickness: Tarpaulin thickness is often measured in mils, where 1 mil is equivalent to 0.001 inches or 0.0254 millimeters. Light-duty tarps typically have a thickness of around 6-10 mils (0.15-0.25 mm), medium-duty tarps range from 10-14 mils (0.25-0.35 mm), and heavy-duty tarps can have a thickness of 14 mils (0.35 mm) or higher. Again, these thickness ranges are approximate and can vary.

It's important to note that tarpaulin weight and thickness are not always directly proportional. Other factors, such as the type of material, construction method, and specific performance requirements, can also influence the overall strength, durability, and quality of a tarpaulin.

When selecting a tarpaulin, consider the intended use, environmental conditions, and the level of protection required. It is recommended to check the product specifications provided by the manufacturer to ensure that the tarpaulin meets your specific requirements in terms of weight, thickness, and overall quality.