This is what I get for ordering my yarn online. . . how often have you checked a yarn’s weight on its ball band, said “no way” and knit it up at a very different gauge? I get that we all knit at a different tension, but some yarns just shouldn’t be knit at their recommended gauge if you’re trying to get a fabric of typical density and drape.
I ordered Berroco Modern Cotton DK to make Xmas stockings. It’s closer to sport weight than DK. I ordered cheapo DY Choice DK with Wool to make a hat for the girl next door. It’s closer to worsted than DK.
Here’s what the labels claim: Modern Cotton (the thin cotton yarn) says 23 sts per 4" on US 5 needles. DK with Wool (the thick acrylic yarn) says 22 stitches over 4" on US 6 needles.
I do not believe you . . .
Yes, you can force both yarns to meet that gauge if you really want to, but you shouldn’t–not only is the cotton literally 1/2 the diameter of the acrylic, but the cotton is smooth and dense and the acrylic is springy and fuzzy. I knit up a quick swatch of each on the same size needles. I got 21 st per inch in the cotton–very gappy and unattractive. I got 16 st per inch in the acrylic, which is a good gauge for the yarn.
It’s not like it matters; I can see a cat hair already embedded in the yarn in the photo, so by the time these projects are done, enough hair will have twisted into the yarn to make them both aran weight.