I am ordering a bike on line and it is 26''. l wanna know if this is an okay size for me if I am a 5'3 125 pound woman?

yes, it should be fine, but you can go to a local shop and check them out for fit to be sure,

Yes it will be fine. at 5'2'' l bought a 24'' bike (we are talking bicycles in the motorcycle section, right?) It is too small. You can always lower the seat and handle bars if necessary.

l would go with a honda cr 250 plenty-o-power

Dear pretty lucky33.
First off u need to tell us what type of bike ur buying & if it is ur first bike. This is a pretty vague question considering their r a lot of variables to ur height, weight & what size bike ur getting. One thing is for sure that if this is ur first bike regardless whether it is a sport bike or cruiser. can u handel the power plant on the bike? Have u ever sat on the bike ur looking to order to see if u can easily touch the ground? (If not go down to the local dealership find the same model [year is not to important] & throw u leg over it) Also l am assuming that 26'' is the seat height, remember this when or if u get the bike sit as far forward on the seat as u can this will give u a good indication of u head on view & how easy (or hard) the controls r to reach.
Keep researching & god luck
R.J. Pud din'' sauce

Bicycles? no these are motorcycles.

if you can touch the ground you can always get a lowering kit that run about 100 or less depending on the motorcycle. you can lower your bike up to 2 inches.