Decorate T-shirt

Final Result
Supplies-Yarn-Hook-T-shirt
For the perfect result use a thin yarn (mine is 350 meters in 50 grams) With this symbol (*) I indicate the start and the end of repetitive actions.
Whip-stitch the bottom of the T-shirt with needle and yarn (the length of stitch should be equal to the length of simple crochet to be in the first row). Whip-stitch: pass the needle in the fabric from the front side to the back one, then upwards into the formed loop. Start to stitch from the side seam of the T-shirt. The amount of stitches should be divisible by 18.
First row: start with simple crochets, capturing each stitch.
That's how it looks like.

Second row: 6 simple crochets,double crochet into the third simple crochets of the previous row. *3 simple crochets , double crochet into the third simple crochets of the previous row*. After last double crochet make 3 simple crochets and slip crochet into the third of first six simple crochets.

 Third row: 8 simple crochets, double treble crochet in the same crochet, 3 simple crochets, treble crochet in the same crochet. *Skip a double crochet of the previous row, treble crochet into the next one, 3 simple crochets, double treble crochet in the same crochet, 3 simple crochets, double treble crochet in the same crochet,3 simple crochets, treble crochet in the same crochet *. After last treble crochet make a treble crochet into the first double crochet of the previous row, 3 simple crochets, slip crochet into the fifth of first 8 simple crochets.
Fourth row: make 2 slip crochet to get the middle of the second arch. 8 simple crochets, single crochet into the second simple crochet of the next group of arches (half way along) .*7 simple crochets, single crochet into the second simple crochet of the next group of arches (half way along)*. 7 simple crochets, slip crochet into the first of 8 simple crochets in the beginning of the row. Fifth row: 1 simple crochet, 4 single crochet , *5 simple crochets, 5 double crochets in the middle of the next arch, 5 simple crochets, 9 single crochets, beginning with the forth simple crochets of the next arch*. After last fifth double crochet 5 simple crochets, 4 single crochet into the next arch, slip crochet into the first simple crochet of the row.
Sixth row: 1 simple crochet, 3 single crochets, *5 simple crochets, 3 double crochets, 3 simple crochets, 1 double crochet into the same crochet then the previous double crochet, 2 double crochets, 5 simple crochets, 7 single crochets*. Finish the row with 5 simple crochets, 3 single crochets, slip crochet into the first simple crochet of the row.
Seventh row: 1 simple crochet, 2 single crochets, *5 simple crochets, 3 double crochets, 2 treble crochets , 4 simple crochets, 2 treble crochets, 3 double crochets, 5 simple crochets, 5 single crochets*. Finish the row with 5 simple crochets, 2 single crochets, slip crochet into the first simple crochet of the row.
Eighth row: 1 simple crochet, 1 single crochet, *5 simple crochets, 3 double crochets, 3 simple crochets, 1 double crochet into the first simple crochet of the arch,1 simple crochet, 1 double crochet into the same crochet , 1 simple crochet, 1 double crochet into the next simple crochet of the arch, 1 simple crochet,1 double crochet into the next simple crochet of the arch, 1 simple crochet, 1 double crochet into the next simple crochet of the arch, 1 simple crochet, 1 double crochet into the same crochet, 3 simple crochets, 3 double crochets, 5 simple crochets, 3 single crochet*. Finish the row with 5 simple crochets, 1 single crochet, slip crochet into the first simple crochet of the row.
Ninth row: 5 simple crochets ,* 3 double crochets, 4 simple crochets, skip 2 simple crochets, 1 double crochet into the third one, 2 simple crochets, 1 double crochet into the next simple crochet (between double crochets of the previous row), 2 simple crochets, 1 double crochet into the next simple crochet, 2 simple crochets, 1 double crochet into the next simple crochet, 2 simple crochets, 1 double crochet into the next simple crochet, 2 simple crochets, 1 double crochet into the next simple crochet, 2 simple crochets, 1 double crochet into the next simple crochet, 4 simple crochets, 3 double crochets*. Finish the row with slip crochet into the fifth simple crochet.
Tenth row: 3 simple crochets, picot (3 simple crochets, slip crochet into the first simple crochet), *2 simple crochets, 1 single crochet into the chain of four simple crochets of the previous row, 2 simple crochets, picot, 2 simple crochets, 1 single crochet into the arch between double crochets of the previous row, 2 simple crochets, picot , 2 simple crochets, 1 single crochet into the arch between double crochets of the previous row, 2 simple crochets, picot , 2 simple crochets, 1 single crochet into the arch between double crochets of the previous row, 2 simple crochets, picot , 2 simple crochets, 1 single crochet into the arch between double crochets of the previous row, 2 simple crochets, picot , 2 simple crochets, 1 single crochet into the arch between double crochets of the previous row, 2 simple crochets, picot , 2 simple crochets, 1 single crochet into the arch between double crochets of the previous row, 2 simple crochets, picot, 2 simple crochets, 1 single crochet into the chain of four simple crochets of the previous row,2 simple crochets, picot, 2 simple crochets, 1 single crochet between 2 groups of 3 double crochets of the previous row, 2 simple crochets, picot*.

Finish the row with slip crochet into the first simple crochetHere is my result!Decorate T-shirt with some extra flowers, fillets, sequins, buttons, etc, as a matter of taste. Hope you enjoyed . Thanks for Likes