I think a lot of the smaller ones have to do with the ability to plug into an outlet without blocking the outlet that is above or below it. I also found this one. https://www.amazon.com/dp/B01MTA0D9P/ref=cm_sw_r_cp_apa_DdFTBb5T642QP Another thing you could do if you wanted it to be a lower profile you could do something like this. https://www.amazon.com/dp/B00B29KS4G/ref=cm_sw_r_cp_apa_GnFTBbD3NVMBV