What if you have another ball that's a lace-weight solid color yarn that you don't yet have a project for?
What if you try to combine them? What size needle would you use? What would you make with them?
It's kind of a fun project to figure out.
For me, I decided to do a cowl. The chunky would be nice and warm and the lace-weight would allow me to add some nice details.
I started off with a sort of in-between needle size but quickly realized that it was going to be way too small for the chunky. Since I was going to be doing a lacy insert into plain stockinette, I realized I could use different size needles for each of the yarns with very little effort and bridge the gap that way.
So I did stockinette for the chunky using size 8-9 needles and then I transitioned to size 4 needles for the lace.
For the lace I did a really simple, super lacy old lace pattern called "faggoting" which is simply doing 1 round of yarnover/knit 2 together and 1 round of knit. These 2 rounds are repeated as often as needed to make it the length you want.
I did a few short sections in the bottom before knitting a long center section, basically to use up the whole skein.
I was going to do a long lace section before doing the edging but I got bored so it was shorter. This was one occasion I was glad of my sometimes short attention span because it came out much better.
So go explore your stash and try your hand at combining 2 different yarns that you might not have thought to put together. See what you come up with!