measuring a arms

[treadway47025]

I have a set of a arms that came on a 250r I picked up to fix up recently. The man said that they are + width a arms but not sure how much. I am unsure of it , but it did have a durablue adjustable rear axle. It had one spacer on the inside of the hub and one outside and it matched the front width well. Is there any measurements I should make of the aarm itself to determine what it is?

[250Renvy]

I believe stock width is 14" from center of pivot to ball joint, so effectively +1 would be 15", +2 16", +3 17"

I don't know if this will help, but this is a pic of +3 and stock.
http://i75.photobucket.com/albums/i289/250Renvy/DSCN2742.jpg?t=1220548924

I don't have these anymore so I can't really be sure beyond what I think I remember.