What size hinges are typically used when two hinges are used to hang a 1 3/8-inch interior door?

When determining the appropriate size of hinges for a 1 3/8-inch interior door, a hinge size of 3 1/2 inches is commonly recommended. This size provides adequate support for the weight of the typical interior door, ensuring proper functionality and alignment when the door is opened or closed.

The 3 1/2-inch hinge allows for sufficient bearing surface and offers a good balance between the size of the door and the support it requires. These hinges also help prevent sagging over time, which can occur with smaller hinges that are not designed to distribute the weight of the door effectively.

Using hinges that are too small could lead to mechanical issues such as binding or misalignment, while larger hinges may not be proportionate and could disrupt the aesthetic of the installation. Therefore, 3 1/2-inch hinges are the standard choice for hanging a 1 3/8-inch interior door, providing durability and stability.