Diameter -65mm ,Width Is 9mm , & Thickness 5 Mm,Internal Diameter Can Be Adjustable,Colour Is Red And Black,Made Of Silicon With Stainless Steel ,Clasp Is Folder Clasp Design Makes For An Adjustable Fit, As Well As Ease In Putting On And Taking Off. Men Style Designed For Either A Night Out In Town, Or A Simple Trip To The Store, It Is Sure To Become A Necessity You Will Not Want To Leave Home Without. Perfect Gift For Just About Any Occasion,