This Barrette is made in France, 4 inches in length. This style is unusual as it is quite narrow at 6mm or 1/4 inch wide across the top. It also does not have a tension bar. It is simply 2 pieces. Based on what we hear, this style will hold the most hair. So if you are looking for something particularly for thick hair you might give this a try. These barrette blanks that are are made in France will all be stamped "made in France". Chinese copies are often sold as a "french clip" but they will not have the "made in France" stamp on them. You will find the Chinese version also have three separate parts, they tend to break and are made of a weaker steel. The measurement given is the length of the barrette back from end to end. You can use these barrette backs to glue, solder or sew things on to. French auto-lock barrette backs are of Superior quality and meet EU Nickel directive.