This object border is similar to Stroke Style Layer Effect in Photoshop. This simple effect is useful to make the object look cuter or to emphasize the object. It is also commonly used on texts to make them more readable.
Although this object border effect can be created easily in GIMP using Add Border plug-in, you won’t get good results. That’s why I write this step-by-step tutorial that shows you how to create an object border manually using GIMP.