Onion mesh bags are commonly used for packaging and transporting onions, and sometimes other produce. The content of an onion mesh bag is, unsurprisingly, onions. These bags are designed to allow air circulation, which helps to prevent moisture buildup and extend the shelf life of the onions.

The quantity of onions in a mesh bag can vary depending on the size of the bag and the specific packaging practices of the producer or distributor. Onion mesh bags are available in different sizes to accommodate various quantities of onions, ranging from a few pounds to larger quantities for commercial distribution.

It's worth noting that onion mesh bags are also used for other vegetables like potatoes and garlic, so the content might include these items as well, depending on the labeling and purpose of the bag. Always check the label or product description for specific information about the contents of a particular mesh bag.