I have a few lots of Robert Allen upholstery samples I'll be listing - largely late 1990s - they have Robert Allen tags on them and the fabric content varies - feels like heavier quality upholstery fabric.  You may consider these medium to heavy weight fabric?  I'm not a seamstress but have sold on eBay 25 years.  Just found all of these at a business liquidation sale.  They measure approximately 16x16 each, some 17x17 - around there overall.  This lot is largely beige/maroon/salmon colors as pictured.    See photos.  Ships out to you from Utah!  (lot C)