The best bet is usually to just get a thong since that wont ride up or show through jeans. Just make sure that that thong is exactly your size. If it is too small it will pinch your hip and show a weird pucker line through tight jeans. If the thong is too big then it will always ride up, which you don't want. To avoid showing through jeans it is all about the size. Size 5 is small, 6 is medium, 7 is large (4 is extra small, and 8 is extra large). Since you usually can't try undies on just remember that if you are below a size zero you want a 4, size zero to four means you need a five, etc. Victoria Secret's website provides really good sizing charts for this. If you don't want to wear a thong, then follow all the instructions above, but get a full coverage mesh panty.