This trimming is typically a ½ inch or thinner and used to conceal ticks on exposed wood chairs or upholstered walls.

Gimp is a type of trimming that is generally ½ inch wide or thinner and is specifically designed for decorative purposes while also serving a functional role in interior design. It is commonly used to cover raw edges or seams, providing a neat finish that conceals any unsightly ticks or raw edges on furniture, such as exposed wood on chairs or the edges of upholstered walls. The stiff and structured nature of gimp allows it to hold its shape and stay securely in place, making it ideal for these applications.

While braid, cord, and header can also serve decorative purposes, they typically lack the same functional capability or specific width associated with gimp. Braid usually has a more textured and wider profile, while cord may not provide the same coverage or concealment for raw edges. Headers are more commonly associated with drapery and curtains, used to create fullness at the top of window treatments rather than concealing edges on furniture. Thus, gimp is the most suitable choice for the described use case.