UD5 Toolkit
Ring Size Converter – Online Circumference/Diameter to US, UK, EU
Measure a ring's inside diameter or circumference and convert to US, UK, European, and Japanese sizes.
Fashion & Apparel Tools
6+ toolsSunglass Tint Selector – Online Activity & Condition Guide
Choose your main activity (driving, fishing, skiing) and get the best lens tint color and VLT recommendation.
Hat Size Finder – Online Head Circumference to US/UK Size
Enter your head circumference in cm or inches and get the corresponding hat size in US, UK, and EU scales.
Necktie Length Calculator – Online Knot, Height & Collar Style
Enter your height, knot type (Four‑in‑Hand, Windsor) and collar to predict ideal tie length. Avoid too short or long.
International Bra Size Converter – Online US, UK, EU, FR, AUS
Convert band and cup sizes between US, UK, European, French, and Australian systems. Accurate shopping abroad.
Shoelace Length Calculator – Online Eyelet Pairs & Pattern
Enter number of eyelet pairs and lacing style to find the correct shoelace length in inches/cm. Never buy too short.