how to measure ring size uk

{"title":"Ring Sizer EU US Finger Measurement Scales Kit Jewellery Tools","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/7c\/8d\/c3f6936fce2f7a366f0e5cd4f3cb-200x200-1.jpg","attrs":{"Price":"$1","Brand Name":"TOOLTOS","Model Number":"US EU","Minimum Order Quantity":"100","Delivery Time":"7 working days","Place of Origin":"CHINA","Payment Terms":"T\/T","Supply Ability":"9999","Material":"Plastic","Color":"Blue\/Red\/White\/Purple","Usage":"Measure","Size":"29X8X3 cm","Weight":"800g","MOQ":"100","Quantity":"1","Features":"Easy to use"}}