For PinPic purposes, a Jumbo pin is one that is at least 3 inches (or 25.4 mm) tall. You may see the term "Mini Jumbo" used on pins that come from Hong Kong Disneyland, but the term "Mini Jumbo" would be used only when the pin is sold as a "Mini Jumbo". When in doubt, use the 3 inch standard -
3 inches tall or more = Jumbo
Less than 3 inches = Not a Jumbo.