Are Line Roller bearings on spinning reels usually around the same size like reel handle bearings? I have a few reels that I believe have bushings in the line roller that I would like to upgrade to bearings. If anyone knows what size to look for that would be greatly appreciated. 

No, there is no standard.  It's easiest if you contact the manufacturer and buy an OEM replacement.  Or, you can measure the bearing and order from a third party maker.

The advice above is spot on. I've replaced a few line roller bushings with bearings and used vernier calipers to measure the bushing. I believe the calipers with like $12 at harbor frieght. Great tool to have handy to measure a variety of things. 

5 minutes ago, EvanT123 said:

The advice above is spot on. I've replaced a few line roller bushings with bearings and used vernier calipers to measure the bushing. I believe the calipers with like $12 at harbor frieght. Great tool to have handy to measure a variety of things. 

This may seem like a stretch, but would you have happened to switch out the bushings to bearings on an Okuma Trio 20, Mitchell Pro 308, One T hree C reed X 1000, or Daiwa Ballistic EX2000? If so what were the sizes of the bearings?

 

Just asking because it just may save me a trip to Harbor Freight if you have any of these reels...

24 minutes ago, ib_of_the_damned said:

This may seem like a stretch, but would you have happened to switch out the bushings to bearings on an Okuma Trio 20, Mitchell Pro 308, One T hree C reed X 1000, or Daiwa Ballistic EX2000? If so what were the sizes of the bearings?

 

Just asking because it just may save me a trip to Harbor Freight if you have any of these reels...

I did a daiwa lexa once but it was so long ago I have no idea what the size is. The calipers are great for measuring bearings, tip tops, and screws among other things. Well worth the investment.