I want to wear these over my lasportiva...
I want to wear these over my lasportiva Nepal evo Size 46.5 ....since i have no experience in buying gaiters I would appreciate some help...
Will it keep my legs dry while crossing streams ??
You'll want to grab a pair of XL gaiters.
They will keep your feet dry to a point. I used a pair with some La Sportiva Makalus. Walking in the Escalante River (not crossing - actually walking in) they kept my feet dry until the water rose over the top of the gaiters.
I would agree with what Dave says, if you're not sure you can consult the sizing chart, however you're right in between the XL and XXL. I would say the XL should fit just right though.