This is a tutorial for crocheting a baby jacket size 3 to 6 months. This video shows the fourth part - sew together all parts, next part contains the sleeve straps.

Corresponding material recommendation:
Wool
http://www.amazon.com/gp/product/B00WQ9NBWW/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B00WQ9NBWW&linkCode=as2&tag=wwwcrochetd0e-20&linkId=3SLHXMZC2N64HLXS

Crochet hook
http://www.amazon.com/gp/product/B008J140QW/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B008J140QW&linkCode=as2&tag=wwwcrochetd0e-20&linkId=DFCYKROJKBZNXKYH

Tapestry needle
http://www.amazon.com/gp/product/B0021GN2BA/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B0021GN2BA&linkCode=as2&tag=wwwcrochetd0e-20&linkId=JT7BF5BOD6ZOAY5H

Scissors
http://www.amazon.com/gp/product/B002YIP97K/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B002YIP97K&linkCode=as2&tag=wwwcrochetd0e-20&linkId=GFZVGELCKN5QGFGM

Measure Tape
http://www.amazon.com/gp/product/B000YZAO2K/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B000YZAO2K&linkCode=as2&tag=wwwcrochetd0e-20&linkId=3PMWQDHO6P7TT2UK

Buttons
http://www.amazon.com/gp/product/B00TIYY6UY/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B00TIYY6UY&linkCode=as2&tag=wwwcrochetd0e-20&linkId=OEPLSKP77KUNIXDZ