7 Nylon strings:
1st string - 0.63-0.72
2nd string - 0.68-0.72
3rd string - 0.78-0.82
4th string - 0.80-0.82
5th string - 0.80-0.85
6th string - 0.98-1.02
7th string - 1.02-1.04
Usually I use Ernie Ball 2403 strings: two 1st strings, three 2nd strings, one 3rd string and one 4th string (1501 1502 1503 1544)
For better quality I use carbon Hannabach 725 Goldin