YSK: When buying a suit, it’s generally expected that you will get the suit tailored to you so that it fits better. Plan to buy the suit at least a week ahead of when you need it to allow for the tailoring time.
from /r/YouShouldKnow
YSK：在購買西裝時，一般都希望能得到爲你量身定做的西裝，這樣纔會更合身。計劃購買西服的時間至少要提前一週，以便留出裁剪的時間。