From Wikipedia:
"Toile de Jouy", sometimes abbreviated to simply "toile", is a type of decorating pattern consisting of a white or off-white background on which a repeated pattern depicting a fairly complex scene, generally of a pastoral theme such as a couple having a picnic by a lake or an arrangement of flowers. The pattern portion consists of a single color, most often black, dark red, or blue. Greens, browns, and magenta toile patterns are less common, but not unheard of. Toile is most associated with fabrics (curtains and upholstery in particular, especially chintz), though toile wallpaper is also popular
Toiles were originally produced in Ireland in the mid-18th Century and quickly became popular in Britain and France. The term, Toile de Jouy, originated in France in the late 18th century. In the French language, the phrase literally means "cloth from Jouy-en-Josas", a town in the south-west suburbs of Paris."
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Free match wallpaper also goes by the names ‘Open Match’, ‘No Match’, ‘No Repeat’ and ‘Random Match’. This type of wallpaper either doesn’t have a repeating pattern or doesn’t have any design elements that need to be matched at the seams.
Straight match wallpaper has design elements that cross the edges of the wallpaper sheets and need to be matched up. When hanging this type of wallpaper, it is best to lay it out on the floor beforehand. You will notice that each strip of wallpaper will be cut to look exactly the same.
Offset match’ or ‘drop match’ wallpapers have design elements that cross the edges of the wallpaper strips and need to be lined up. However, across the wall, these design elements might be bigger or made to look less regularly patterned. When you put the puzzle together on the floor before hanging it, you will notice that each strip does not look the same and you will need to cut off large pieces in order to align the design elements. 'Half drop' repeats will be identical every other strip whereas 'multiple drop' repeat wallpapers won't repeat for three strips or more! Offset match wallpaper is harder to hang and produces the most waste – but it sure does look amazing!