Pattern is Japanese, but fully charted using standard knitting symbols. Direct link to pattern PDF here.

Materials:

• Japanese size 3/0 crochet hook (2.3mm)
• 1 button (20mm in diameter)
• 250g (593.75m) color A
• 60g (142.5m) color B

Gauge in stockinette is the same as the gauge listed for pattern stitch. Only the flower motifs adorning the shoulders are worked in the round; the vest itself is worked flat.

Note: overall shorts in the photo can be found here. The yardage in the pattern is not listed separately for the shirt and overalls, so the amount of yarn listed here is for both items.