Because Comexim is a Polish brand, the cup sizing is not going to exactly correspond to traditional UK brands (like Panache, Freya, Elomi, Curvy Kate, etc). The size listed IS UK sizing, but Comexim bras run about two cup sizes small compared to these UK brands. SO, for a fit that is technically correct and gives adequate wire coverage on the sides, you should order two cup sizes larger than you do in your regular UK styles. For a little extra oomph, only order up one cup size, especially if you have an empty/shallow upper bust. This will give you more volume and a little less side coverage.
The Comexim Lavender Padded Plunge Underwire Bra (CMLAVEND) is a supremely stunning plunge bra that has multi-section underwire cups with light padding for high rounded shaping with plenty of support and lift, plus a truly one-of-a-kind design pairing a deep jewel-toned purple with graphic illusraitive print and gray floral lace. Fully-adjustable shoulder straps feature a satin look and contrasting colorway. Pair with the Comexim Lavender Matching Lace Thong (CMLAVENDMT) for a matching lingerie look. Thong sold separately.