Size 6 knitting needles. I actually used a few double-pointed needles and just cast on enough to fill the length without falling off.
I casted on 30 stitches and knit in garter stitch until I had a dishcloth! Easy peasy.
The yarn being a mix of colors kept it interesting. I liked that this yarn was 100% cotton rather than a synthetic blend but the yarn line does have the synthetic blend if that's what you're after.
I was able to make 3 from 1 ball of yarn! Once I gave to my mother and the other 2 pictured above I kept. You can see that one of mine is much larger than the other - I did not do an accurate job of estimating the amount of yarn I had left but I don't really care that they're different sizes :)