"throw" pillows vs "accent" pillows - ??

[ColsCreations]

Not sure if this should be in Technical or Ideas or Ask a Question so parking it here.

"throw pillows" have three size choices of 16x16, 20x20, or lumbar 13x21.

But there's a separate listing for "accent pillows" which are 12x16.

To me "throw pillow" and "accent pillow" are interchangeable terms, both meaning a decorative pillow as opposed to a bedding pillow. But whether you search for just "pillows" (1,235,757 results) or use the Site Map link to Home & Living --> Pillows (440,365 results), the category options offer no distinction for throw or accent. 

And no combination of Category choice and other filters let me narrow it down by size. 

It has Nursery, Outdoor and Indoor as shapes?? Wouldn't 'nursery' be a theme and outdoor/indoor be fabric choices?

"throw" vs "accent" seems like an arbitrary distinction based on sizes that customers have no way to search/sort/narrow down by. There should be a size filter for pillows, and at very least, a choice in the main Category filter of Throw or Accent since Zazzle has them separated as two different product types. 

[Susang6]

In my decorating work (and on my blog), I usually say accent pillow because the pillow is accenting the space bringing in the color, pattern, or texture that ties everything together. But in everyday interior‑design language, “throw pillow” and “accent pillow” are totally interchangeable. They both fall under the same decorative‑pillow category.  Online retailers and POD’s separate them by size for organizational purposes, not because they’re fundamentally different types of pillows