8 comfortably

To obtain the optimum crinkle look at T-shirts, the top should not be too tight. So who stands between two sizes, should decide for the greater, as the normal shirt fails.
A larger number has the additional advantage that the shirt goes up over the hips, if you like this.

The lace goes well with the creased look. But due to the dark blue color the tip is very discreet.
Below a rubber sewn, which ensures that the shirt does not slip.

Conclusion: A casual shirt for summer sitting comfortably.