Hello,
I’ve updated the theme on your website. Now, there’s no need to reduce the size of the header to display the menu items correctly. I’ve taken the liberty to set the header size as you initially intended. If you added any extra CSS to fix the menu, please remove it.
I hope I have been of assistance. Additionally, if you’re satisfied with our theme, we would greatly appreciate a 5-star rating at https://wordpress.org/support/theme/attire/reviews/#new-post.
Best regards,
Shafayat