Colour Complements, one of my favorite makers of hand-dyed multi-color threads has a great sale happening now. Many colours of sizes 12, 8 and 5 pearl cottons and some cotton floss are on sale ALL are marked down 25%.
They also make great samplers that have skeins of several different threads dyed to match. They are fantastic for geometrics and stash-bustong projects. They are currently marked down. If you see a combination you like, snap it up, they are not always available.
Finally her wonderful tubular rayon is back in stock. This is a thicker thread, perfect for larger canvases.
See them all in her Etsy store: https://www.etsy.com/shop/colourcomplements