Shopping.com has changed their data feed specifications. They now accept 4 new fields (for apparel + shoes) and will begin displaying them on their site in early November.  The fields are:

Gender - The gender(s) for which the product is made.

Type - The type of product.

Size - All available sizes for the product.

Color - The color of the product. (Note from Shopping.com: While we will map color values to the most popular colors on shopping.com, you should provide the original product color to us. In the event that the product is multi-colored, please separate the colors with a slash (/).)

Shopping.com indicates that the most significant change is that they are now asking merchants to provide an individual record for each color in which a product is available, as opposed to one record with multiple colors listed. This will allow Shopping.com to accurately display color and size information provided by you.

If you’re a SingleFeed merchant, you know that our system already supports these fields. Now that Shopping.com supports them, too, we have re-formatted our Shopping.com feeds to include the new fields.  You don’t need to do anything!
If you use these fields currently, know that we’ll now be sending that information along to Shopping.com. If you’re not currently using these fields, and if you sell apparel or shoes, we highly recommend that you look into providing them!  Shopping.com will most likely create new filters based on these attributes, so if you’re not including this information you won’t show up in the filtered search results.

You can review Shopping.com’s new feed spec here: Shopping.com Feed Spec Changes