Chanel no longer produces single flaps so any single flap jumbo or maxi will be an older year. Which is better? Totally personal preference! Single flaps tend to be lighter whereas double flaps weigh more due to the additional leather, however, because of this double flaps also hold structure better over time. Double flaps, in addition to having the exterior (front) flap, have a second flap inside. What's the difference between single and double flap? Single flaps are just that - a single, exterior flap. Maxi Flaps - single and double flap (double flap is now only available in boutique) Jumbo Flaps - single and double flap (double flap is now only available in boutique) Mini Flaps - all single flap (can only be worn single strap as well) Which sizes come in single flap? Which sizes come in double flap? Wondering what year your bag is from? Take a look at the first one or two numbers and match it to a year! For instance, a 19 series bag is from 2014. The first one (7 digit serial numbers) or two (8 digit serial numbers) numbers of every serial number correlate to a specific year. We will also be adding a quick guide reference for the Reissue and Boy styles soon! In this blog post we'll go through some of your need to know basics regarding one of Chanel's most popular, and sought after, styles. Dimensions, serial numbers, materials, hardware - there's so much to know about Chanel and specifically the iconic Classic Flap.