Thank you for taking the time to contact Sears.
A Twin XL is approximately 38" W x 79.5" L
The 3/4 size typically measures 48" W x 75" L
We have a few mattresses in that size - 48 x 75:
Cambridge II - 82919 is the mattress (mix and match is 77167 - fabric could be different, but construction is the same) - available on line and in retail stores
Yale - 88017 firm mattress, 88093 plush mattress (available in stores, not online right now - Paula, can you have these added online)
58463 - 3/4,BEST,FOAM,RPLCMNT,MAT - online and in the 31'4 and 30'4 catalogues.
Have a great day!
Date published: 2014-07-31