The 2XL Glorious pad is great (36"x18") - I've had two for about five years with no issues. https://www.amazon.com/dp/B00NOCZTTI/ref=cm_sw_r_sms_apa_i_c3NsEbVY3HSNG

They also have a 3XL (48"x24") which is gargantuan if you have the desk space! All sizes are shown in the link above.