Make one for all the Martial Artists in your life...
Cast on 13 stitches on US#4 needles.
Work in Stockinette Stitch (Knit one row - purl one row) for 18 rows.
Row 19 - Knit 6 stitches and turn work.
Row 20 - Purl 2 together and purl to end.
Row 21 - Knit 5 stitches and turn work.
Row 22 - Purl 2 together and purl to end.
Row 23 - Knit 4 stitches and turn work.
Row 24 - Purl 2 together and purl to end.
Row 25 - Knit 3 stitches and cut yarn.
for the other side of the V-neck:
Row 19 - Attach yarn to the remaining stitches and knit 2 together and knit to end.
Row 20 - Purl to last 2 stitches and purl 2 together and turn work.
Row 21 - knit to end and turn work.
Row 22 - Purl to last 2 stitches and purl 2 together and turn work.
Row 23 - knit to end and turn work.
Row 24 - Purl to last 2 stitches and purl 2 together and turn work.
Row 25 - knit to end and turn work.
for the back:
Purl across 3 stitches then cast on 7 stitches using a single yarn cast-on technique - then purl across the three stitches for the other side - you should now have 13 stitches again.
Continue in stockinette stitch for 25 rows for the back and cast off.
for the sleeve:
Fold the dobok in half lengthwise and find the center. With right side facing pick up and knit 13 stitches centered on this side. Work in Stockinette stitch for 22 rows and cast off.
Repeat this process on the other side.
Fold the dobok in half at the shoulder and stitch from the end of the sleeve to 3 rows above the bottom. Repeat for the other side. Weave in all loose threads and turn the dobok right side out.
For a Black Belt Dobok:
Using black yarn single crochet around the neck opening.
For all lower Belts:
Using white yarn single crochet around the neck opening.
For the Belt:
Make a chain of about 50 loops using the color of the belt you wish to replicate and attach it with one stitch to the front center of the dobok - then take the ends to the back and back to the front where they cross over the belt and get tied with an 'arrow' pointing right.
For the purple trim belt (purple with white) Chain 50 then with white yarn backstitch through the centers of the chains.
In our Association - there are several solid color belts - White - Orange - Yellow - Green - Blue - and Purple
then Purple Trim - which is purple and white
Then Brown and Brown trim - which is brown and white
Then Red and Red Trim - which is of course red and white
Then Black and there are 4 degrees of Black belt - each signified by a gold bar - to Master.
Other associations use different colors and some of the trim belts have black instead of white - some even use a Camouflaged - not sure what that one stands for as all of the colors have 'meaning'.