Amazon.com: OYT Twin Size Mattress, 6" Inch 39"*75"*6" Gel Memory Foam Twin Bed Mattress in a Box with CertiPUR-US Certified Foam for Sleep Supportive & Pressure Relief,Cloud-Like Experience : Home & Kitchen
39 Inch Mattress - Wayfair Canada
Sealy Saint-Jean Mattress Twin XL Size 39 in. - Twin XL | Accent Home Furnishings
Mattress Size Guide: Selecting the Right Mattress | GhostBed® Canada
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ENHANCE PLUSH EURO TOP 39" TWIN XL MATTRESS | Ancaster | Chatham | Kitchener | London | Sarnia | Windsor
Japanese Floor Mattress, 4 inch Extra Thick Futon Mattress,Shiki Futon Cushion | eBay
Mattress Sizes & Bed Dimensions: the Ultimate Guide