What standard measurement is typically used for wood studs in residential framing?

In residential framing, the standard measurements for wood studs are typically 2x4 inches or 2x6 inches. This sizing is based on nominal dimensions, where the actual dimensions are slightly smaller due to the milling process. For instance, a "2x4" stud actually measures about 1.5 inches by 3.5 inches.

Using 2x4 studs is common for constructing interior walls, while 2x6 studs are often employed for exterior walls, particularly in areas where additional insulation is desired. This choice of dimensions allows for effective structural support and is economical and practical for framing residential buildings.

The other options, such as 1x4, 1x6, 3x3, and 4x4 studs, do not meet the typical requirements for framing due to either inadequate structural capacity or suitability for wall construction. Therefore, the critical understanding is that the 2x4 and 2x6 dimensions provide a balance of strength, ease of handling, and compatibility with insulation materials.