I'm not sure that laundry bags are all that popular these days. I don't think I've used one myself since my college days when I had to haul my clothes to the laundromat five blocks away from my apartment. Now I just use an old wicker laundry basket to haul things downstairs to the washer. And one of my cats really likes to ride back upstairs on top of the just-dried warm clothing.
But back in the day pretty laundry bags were much more common. The three shown here are ones I've collected during the past year and that I've decided to sell on my website. They're also not too difficult to make yourself from a piece of pretty vintage fabric so use these as inspiration if you like.
This first is sewn from a piece of vintage polished cotton with lilacs. I bought a large piece of this same fabric a couple of years earlier so I'm sure it's the same design even if the polish has been laundered out.
The second bag is sewn from a bright red and green floral - chrysanthemums, I think, and has a double pocket along the bottom. It's decorated with white chain stitch embroidery along the edges—very simple and pretty.
The third is made from heavyweight white cotton and has the word laundry and two colorful parrots embroidered on it.
This last one is from my personal collection—I may part with it someday but not just yet. It's designed to slip over a hanger and is probably for smaller items like lingerie. Super cute embroidery of a sailor cat with the letters spelled out on little flags. I have this hanging on my laundry room wall!