FWIW, the IPC acknowledges that there is no universal inductor footprint, so you have to apply their footprint design rules carefully to come up with a reasonable footprint.
In smaller values, conventional chip sizes are typical. 0603, 0805, 1210, 1812; but also nearby sizes, with different terminations (usually bottom pads instead of wraparound metallization), 0806, 1212, 1816, etc.
For footprints, bigger is usually better, yes. As long as you can get a soldering iron around the biggest part you expect to use, you're fine!
Also watch out for manufacturers using different units for their numbering schemes: Vishay IHLP family are imperial (IHLP2525xxx = 0.25" / 6.3mm square), others are metric (Taiyo Yuden NRS6045 = 6.0 mm square, 4.5mm high). Just name your footprints consistently (choose in or mm)...
Tim