???

I am new to biking but I just bought a 1995 savage and it is missing the right hand grip. I am interested in the Kuryakyn hand grips but I do not know which size I need. Please help!

One Inch.   The bars are one inch in diameter.  

Now, you need to make sure you're getting grips that are made to slip over the throttle sleeve.  

Some grips are made for Harley (and other bikes?) and may have the throttle sleeve built into it.  I have not been able to discern if an HD throttle sleeve will fit the LS650.  It may work but I'm not going to be the first guy to jump in that pool.

The LS650 throttle sleeve has a series of ribs molded long it's length.  You'll need to remove the ribs.  I did mine by taking a coarse file and placing the throttle sleeve in a vise and filing.  It took about 5 minutes.  Other people have done that while it's on the bike, but it makes a mess and little bits of plastic will get everywhere.

Good Luck and post pics.  

Gitarzan's right.  This should be in Rubber Side Down.  The correct Kuryakyn grips are the 6240's. Be advised, that adhesive is wickedly good at it's job, so be sure you get it right the first time.  I love the grips though.  I got mine on eBay for about $40 I think.  The local stealership wanted around $60.