Many modern bed frames (platform beds) do not require a box spring at all, which could save you more money in the long run.
Zinus Armita 7-Inch. Highly recommended for those who want a lower bed height without sacrificing the look of a traditional box spring. The Trade-Offs: What You Sacrifice Cheap Box Springs Premium Foundations Slat Spacing Often 6+ inches apart; less support. Typically 2–3 inches apart; best for foam. Materials Thin steel or lightweight pine. Solid spruce, heavy-duty steel, or hardwood. Longevity May start to squeak or sag after 1–2 years. Often lasts 10+ years. Assembly Often required (DIY setup). Usually arrives fully assembled. Buying Advice buy cheap box spring
Standard box springs are 9 inches, while "low-profile" ones are 5 inches. Measure your current bed height to ensure your mattress doesn't end up too high. Many modern bed frames (platform beds) do not