If my jeans size in malaysian is 32 what will be my jeans size in usa?

That's a good question. Unfortunately, there's no cross reference for an answer. It not only depends on where the jeans are made, it also depends on the quality standards of the manufacturer. I bought jeans yesterday that were American Carharts, but made in Mexico. I had to try on four jeans that all said 33, just to find two that fit. That's how far off the cutting and sewing is. If I had been buying Levis or Lee Jeans, I may have had to start with 32s or 34s to find the fit of the Carhart 33s. Weird huh?