Eric wants a pair of jeans in ‘next size up’. What does he mean？

Eric wants a pair of jeans in ‘next size up’. What does he mean？
A.He wants a smaller size.
B.He wants a larger size.
C.He wants the same size.
D.He wants a looser pair of jeans.
正确答案：He wants a larger size.；He wants a looser pair of jeans.