You need:

• tailor's marker for fabric
• thick needle
• thread
• the thinnest hook, like 0.6

1. Make the marking:

2. Make punctures with a thick needle:

3. Use the blanket stitch around the edge, see what it looks like from the right and back sides:

4. And pin the cups:

5. Then carefully sew them to the crocheted swimsuit:

6. Ready!

Thanks for reading my tutorial! I wish you success! :)

Sincerely yours,
Tatiana