juliet Avon

Check the scaling on it before you upload in blender in object mode is set to max 1.0 (if its higher sl will size it down to scale 1.) if lover is also ok, it might scale it up. it must not be negative on any of the parameters that will course issues. And check the scaling when you upload in second life, there a box you might need to change settings on, but like someone else said there is still a size limitation when you upload + link distance if your uploading multi objects/scene at the same time.