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Twin mattresses are ideal for kids' bedrooms, or rooms where bunk beds or daybeds are used. Serta produces a wide variety of twin mattresses featuring both innerspring and all-foam support systems. Twin mattresses are often referred to as “single” mattresses.

A Serta twin mattress measures approximately 38" x 74.5". These measurements can vary by +/- 1/2". Size availability varies by product and retailer. Mattress heights vary by product, so please see your retailer for information on specific model height.

Serta also produces Twin XL mattresses, which measure approximately 38" x 79.5". Twin XL mattresses are often used in college dorms and hospitals.

Width × LengthStandard Size
38" × 74.5" Twin
38" × 79.5" Twin XL
53" × 74.5" Full
60" × 79.5" Queen
76" × 79.5" King
72" × 83.5" California King
Download Size Guide (PDF)
Mattress Sizes