There is no right or wrong answer to this question as it comes down to personal preference. If you feel more confident and comfortable in a smaller size, then ordering a smaller size will be a better option for you. However, if you prefer a larger size for a looser fit, ordering a larger size would be a better option.
Of course, everything has a degree, and you must grasp the "degree" when choosing a size. If the size chosen is too small; I think, the suit is no longer usable. If you choose too large, it will be out of shape, making you look like wrapped in a sack.
A smaller size will make you look slim and show off your figure. A large size can make you look lazy and casual.
Therefore, regarding the size of the clothes, you still need to make a choice that suits your own situation. This will make it more comfortable to wear.
The above is my opinion, if you have any questions or suggestions, you can leave your comments.