How can I standardize my website banner size across various desktop monitors?

[LiamP191]

On different monitors, laptop, big monitor and small monitor my website comes up differently.

This effects where my button is placed on their page and how my banner looks...

I'll attach a few images for example.

Is there any way to fix this? It frustrates me a lot.

  

[LiamP191]

My site is: Gigachew.com.au 

[FloridaGlow]

@LiamP191 I have the same question. Were you able to find a solution?