Gallery height issue in Magento

magento

#1

I have change gallery size Height and width of my website image and my website menu is not showing how to fix, i change default size right now width 690 and height 400 in Magento 2 still not showing also clear cache anybody help to sort out please here is website
https://beddingssets.com


Understanding the JavaScript delete operator
#2

A good start would be to validate your code and fix the errors.

https://validator.w3.org/nu/?doc=https%3A%2F%2Fwww.beddingssets.com%2F%3FSID%3Dv21r91d9tvja2mls7nii9bv3f2