Clothes
Western Clothing, Western Style Clothes
noun
Western style clothes is just Western clothing (or Western style clothes). But nowadays, because Japanese people wear Western clothing all the time, we use it to just mean clothes. We're talking things that aren't kimonos, etc.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
洋服を買う前にサイズをチェックをするのは大切です。
It's important to check the size before buying clothes.
今日のデートは和服にしようかな？洋服にしようかな？
Should I wear Japanese clothes for today's date? Or should I wear regular clothes?
早く洋服を着ないと、学校に遅れるわよ。
You should get dressed really quickly or you’ll be late for school.