Material: stainless steel, exquisite manual polishing, fine workmanship 1 Set includes collar, handcuffs and ankle cuffs The original height(width) of collar is 4cm,height of cuffs is 5cm. Weight 5?6kg Collar shape is circle (round),this shape is fixed, height is 4cm. For handcuffs and ankle cuffs,there are 2 styles to offer, circle cuffs and oval cuffs. Size information: Circle Style: Female Size Kit: collar inner diameter 11.5cm, handcuffs inner diameter 5.3cm, ankle cuffs inner diameter 7.3cm, height 5cm,thickness 1cm. Male Size Kit: collar diameter diameter 13.5cm, handcuffs inner diameter 6.0cm, ankle cuffs inner diameter 8.0cm, height 5cm, thickness 1cm. Oval Style: Female Size Kit: collar inner diameter 11.5cm, handcuffs inner diameter 4.8*5.8cm, ankle cuffs inner diameter 6.8*7.8cm, height 5cm,thickness 1cm. Male Size Kit: collar diameter 13.5cm, handcuffs inner diameter 5.5*6.5cm, ankle cuffs inner diameter 7.5*8.5cm, height 5cm,thickness 1cm. 1cm=0.4inch There is attached ring on collar and cuffs,support you to connect them by anyway according to your demand. Customize service is available for this kit, if you need other sizes of this kit, please ask me with your customized size for quotation,customization may cost some extra fee. please note that due to all steel gear is handmade,it is unavoidable that a little size error exsits.Around 0.2cm size error on diameter should be accepted.