éThank you for selecting this New Breast Form. The back is Concave and screw-thread, makes the breasts more space.The back and shoulder traps are adjustable.Take it and be the one you want ! The Perfect Cleavage is NARROW between to breasts;; For example, the 800g total breasts form's L*W*H is 23.5*13.8*5.5cm. This size suits thin men, if you are high and strong build, you should select Perfect Cleavage weight over 1300g/pair or corresponding Wide Cleavage.Wide Cleavage Size:600g/25.5*19*5.2cm;;800g/25.5*19*6.3cm;;1100g/26.5*19*7.5cm;;1300g/28*23*7.5cm.The form comes transparent side and shoulder straps and an adjustable back closure, so it can be wear under any kind of clothes. The Breast Form is made of medical grade external silicone to guarantee a life like consistency, mobility and touch. Perfect Cleavage Size Tips: weight-----Length/cm ----Width/cm ------Height/cm 500g---------21 -----------11.6 ----------4.5 600g---------21.5 ---------12 ------------5 800g --------23.5 ---------13.8 ----------5.5 1100g -------24 -----------14 ------------6 1300g -------26.5 ---------16 ------------6.5 1500g -------30 -----------17.5 ----------7 1600g -------31 -----------18 ------------7.5 1900g -------31 -----------18.5 ----------7.72100g -------32.5 ---------18.5 ----------8.5é