This is a curtain for a full length window. You can adjust the length and width to fit your windows or create a tablecloth. Sizes can be adjusted too by using a larger numbered hook, which is smaller in hook size.
I like to purchase my thread at:

https://www.herrschners.com/product/herrschners%26%23174-...

They have some nice cones that come in 2400 yards. Less having to knot on additional thread when you run out.
I like to use size 10 thread for my curtains because it wears better then the smaller thread sizes. With this thread size, I use a US 7 or 1.5mm hook. This pattern is an easy one. Stitches used are: Double Crochet (dc), Chain (ch).