Is there a way I can have 2 or 3 boxes side by side eg for dimensions ?

Can you please elaborate a bit more on what you would like to accomplish. I am not fully understanding what you are looking for?

When reviewing your form I noticed that you add the image picker which contains many fields where users can upload images side by side.

I also noticed that you have 3 fields asking for width, length and diameter. I am assuming that you are looking to have all this fields in a single row. To get all the fields in a single row, you just have to shrink the fields.

Please let us now if this helps.