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Also, it is important to select standard resistor values instead of finding the closest resistance value on Digikey based on a calculation.
The following link shows See standard resistor case sizes here: Resistor Sizes and Packages
See standard resistance values .http://www.interfacebus.com/resistor_table.html here: Standard Composition Resistor Values
Typically 0603 (0.06” length by 0.03” width) is a good size for a component. 0402 is quite small and difficult to solder but can be used to be space efficient while 0805 is usually necessary for components with higher values but they are larger and as a result can usually be assembled easier.
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