If you’re looking for some fun vest knitting patterns, here are a handful I would totally knit. Patterns are all available on Etsy.
Megan Faith Turner’s sweater vest pattern is a classic, pretty much exactly what I think of when I think of knit vests. It has ribbed edges and even a touch of contrasting color to up the preppie factor. It’s knit flat in pieces in chunky yarn and the pattern listing says it fits UK sizes 4-18.
The London Fog Slipover from Caidree is another great basic worked in bulky yarn. This one has a higher neck and the only ribbing is at the bottom. It’s worked from the top down in the round except for the armholes, and there are 9 sizes available.
Get a trendy high-low look for your vest (this one really is more of a top, but you can wear it as a layer, too) with this one from Through the Stitch. It has a scoop neck, deep armholes and a split hem, and is offered in four sizes.
Add a crop to your vest with the Nova Sweater Vest from Celina Knitwear. This is a great one for layering over a button-down shirt, or wear it by itself if you like. (You can also knit it longer.) It uses worsted weight yarn and is sized XS to 4XL.
Vests with allover ribbing are fun, too, like this one from Daisy and Peace. It uses DK weight yarn and has a relaxed and slightly cropped style. It’s available in six sizes.
The Adrie Vest from Chiagu is more of a layering piece to wear on the outside on spring and summer days than it is something that will keep you very warm, but it is pretty. It has open fronts and a cable accent, with a bit of textured knitting on the back as well. It’s offered in three sizes and uses lightweight yarn.
Cabled vests are classic, and this one from Knitk Store by Kari takes the classic and updates it with a high-low split hem and lots of fun texture. This one is just one size, though you could add width by repeating cables or adding to the textured stitches on the sides. It uses chunky yarn.