Chinese needed when shopping

How much does it cost? - 多少钱 duo1 shao3 qian2
Too expensive - 太贵了 tai4 gui4 le
Is it good quality? - 是好的质量吗? shi4 hao3 de zhi4 liang4 ma?
Is it a copy or is it real? - 是假的或者真的 shi4 jia3 de huo4 zhe3 zhen1 de
Do you have this in another color? - 有别的颜色吗? you3 bie2 de yan2 se4 ma?
Do you have my size? - 有我穿的吗? you3 wo3 chuan1 de ma?
A little smaller - 小一点 xiao3 yi1 dian3
A little bigger - 大一点 da4 yi1 dian3