WHAT SIZE SHOULD I ORDER?Please MEASURE your furniture prior to purchasing. Each piece of furniture is unique and we want you to be thrilled with the fit. You can find a detailed size guide below:Sofa, Loveseat & Chair Size:1. 28" Width Series fits for sofa width equal or less than 24". Refer to length, please add extra 4" - 8" longer than actual sofa length.2. 36" Width Series fits for sofa width between 24" to 32". Refer to length, please add extra 4" - 8" longer than actual sofa length.3. 43" Width Series fits for sofa width above 32". Refer to length, please add extra 4" - 8" longer than actual sofa length.Armrest Size Reference:Two sizes for choice: 28" x 28", 36" x 36", please measure and choose suitable size to match.Backrest Size Reference:Backrest width below 32", recommend folding the 28" x 28" rectangular cover to trianglular shape shown in the picture.Backrest width above 32", recommend folding the 36" x 36" rectangular cover to trianglular shape shown in the picture.CAN I USE THIS ON LEATHER FURNITURE?Our slip-resistant protector works great on both fabric and leather furniture. However, because leather furniture does have a smoother surface, you may find that additional adjustments may be necessary.