Regular-Fit products would fit well to your normal size. If you prefer a bit oversize, take one size up than your usual size.
Oversize-Fit products have oversize chests and dropped shoulders, but their body lengths are normal size. If you also prefer a bit oversize body length, take one size up than your usual size.
Important note: The tables above are given for indicative purposes only. The real product might have small deviations from the values shown in the tables.