To set the default shipping weight:
1. Navigate to Inventory > Inventory Management
2. Click into a product SKU number using the binoculars icon.
3. Scroll down to the Shipping Information section.
4. You will see two attributes:
Shipping Weight Major: Major = pounds/kilograms
Shipping Weight Minor: Minor= ounces/grams
5. Enter your shipping weight defaults and click 'Save'.