If you are interested in modeling weapons from a particular area, for example, the island of Malta, do an online search for a museum or art museum in that area using search parameters like weapons medieval Malta museum.
A small person probably carried a smaller shield than a large one. The exact size of a particular shield was probably keyed to some extent to the size of the warrior carrying it. Small shields will be somewhat bigger than the length of the forearm, so about 18 inches or larger. So, for example, if you're modeling this battle axe,Ī reasonable assumption is that the handle is about an inch and a half in diameter, and if the handle is an inch and a half in diameter, then the head is 10 to 12 inches across from one edge to the other, and about six inches in the dimension parallel to the length of the handle.
While these are not plans or dimensioned drawings for the most part, a valuable skill for a modeler is the ability to determine reasonable dimensions from the image. A Google image search on the keyword phrase 'medieval weapons' brings up a large number of internet images of pikes, bow, battle axes, and others.