Argyle vest for 3 year old

Looking for a short sleeve v neck stocking stitch argyle patterned tank top? Anyone recommend a pattern. Seems we have a golfer in the family

Congratulations on the golfer! An argyle vest is just what the well-dressed golfer needs.
Here are some patterns from Ravelry that come in the appropriate sizes.

Thank you. Found one which I am going to try. It states knitting in round but I want to knit it flat. I assume just half stitches? I ve bought an old bond knitting machine which I have restored and will tinkle until I get tension right

Sounds good. You might consider adding a stitch at each side for seaming. It could just be worked in the background color.