Grid Resizing When Not In Designer Window

okay so i’m new to using the grid system on here, I love it so far, I made a layout for the “Specials” section with grid, I like the size they are in the designer window but when I go to Preview, or development link they shrink down alot, is there a way to not shrink them? I’ve already tried changing the Sizing element to “Not Shrink”

Here is my site Read-Only:

just set the min H to 300px and it looks great outside of designer, sorry for posting!