38a是多大,

请问胸围的尺寸是怎么算的多少至多少是32,33,34,35,36 又多少是32a
加厚款平胸内衣女海绵小胸显大a/b/c不空杯文胸罩32a80a36a85a38a 浅
38a等,按照厘米的计算就是70a.75a.80a.85a
88-90 73-77 b 36a/80a 92-94 78-82 a 36b/80b 94-96 78-82 b 38a
xl码(80c/36c 85b/38b 85c/38c)