question are all stub axle bearing the same size.

If your talking about type one stub axle bearings, the inside diameter, outside diameter and width are the same. Their location is not interchangeable, thrust bearing is the inner and the bearing with the removable ring is the outer.

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how do i tell if i have type 1 or 2 or 3 its a new buggy for me it has a 6 rid with boxed arms?

Is it together or apart? Do you have a 1" to 2" micrometer or a pair of calipers to measure with?
If you have type one, the bearing OD will measure 2.440 (62mm) the stub axle OD will measure 1.179 (29.92mm) Maybe a picture of the wheel side of the bearing house.
Not sure what bus stuff measures or type 3.

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Of all the things I've lost, I miss my mind the most.
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i havent tore it down yet.i might go tomorrow and get something to measure it with.thanks till then thanks.