I have loads and loads of yarn that would knit well on a size 3 or 4 needle, and I was thinking about doing a striped sweater in it, maybe a hoodie. Any simple sweater patterns that would work for yarn of that type?
The only one I can think of that uses thin yarn and small needles is Thermal, at knitty.com, but it’s not striped, nor a hoodie. You can take a pattern you like and maybe make the largest size, or convert their st numbers to inches and then knit according to the measurements.
http://www.ptyarn.com/saphirpatterntop.html (stripes no hood)
Here is full selection of plain basic patterns starting at smallest guage of 28st/4in , includes a hooded pullover, Could add your own stripe or stitch pattern as desired.
http://www.jessica-tromp.nl/freeknittingpatternswomansweatercardiganbasicsknitwear.htm
2 other fine tops,
I recently bought the Jaeger Pattern Book 35, which all use their Jaeger Siena yarn - a “4-ply”, which is between a DK and a fingering weight, and uses about a 3-4 neelde. Here’s a link to the patterns - most are basic stockinette stitch, and pretty classic patterns. https://homepages.force9.net/ethknits/Jaeger/Jaeger-Patterns/Patterns-14.htm