Hi!
Everybody has this same problem when starting out. I remember feeling my hands were not big enough for the stretches that are called for in a scale, but eventually my hands were able to do it.

One thing you can do to make practicing these stretches a little easier right now is to move the entire scale pattern up the neck to where the frets are closer together. After some success there, you can move your hands down a few frets, and then a few more, and eventually you will be able to play the scale all over the neck.

Hope that helps!

Jon