If your old resistors are the same physical size as a new 1/2 W, chances are they are indeed 1/2 W. In all the tube radios I've repaired, I've never found any resistors with a power rating less than 1/2 Watt.

Mark

:ok, so i have resistors that match the same color sequences for the resistors in my radio. now how do i determine the wattage? i threw the package away for the resistors long ago. i bought an assortment from radio shack. the radio i have is a motorola 401 whose schematic is located at this link:
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:http://www.nostalgiaair.org/Resources/581/M0006581.htm
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:this is a first time radio for me to repair so im not to savy on reading schematics. help would be appreciated. some of the resistors are decayed so i figured i may as well replace them. ive all ready tested the capacitors, and will get replacements for the bad ones this weekend.