I'm looking for a wool check jacket to style classically with a long skirt.

There are no wool jackets with a check pattern in the data. Instead, I picked classic single blazers and tailored jackets made of wool that go neatly with a long skirt. The selection includes grey-tone jackets with over 98% wool and a black blazer in a wool blend.

I picked a classic black blazer in a wool blend and a tailored jacket with high wool content. Matching the long skirt condition you were looking at, I also paired a fluid long skirt that goes well together. The jackets are divided into a true-to-size formal fit and a semi-oversized fit.

I picked three cropped black jackets and a fluid long skirt to style with them. The jackets are divided into a single-breasted style with a collar, a closure-free collarless style, and a round-neck style with gold buttons. The materials consist of 100% wool and a wool blend.