3.5 by 6 vs 4 by 6: Which Size Should You Buy?

A 4 by 6 is 15 cm (6 inches) wider than a 3.5 by 6: 122 cm vs 107 cm, both 183 cm long. Choose 3.5 by 6 for one adult in a small room. Choose 4 by 6 if one adult wants more space or two people will share occasionally.

By Mattresses Kenya · Updated 2026-10-08

Side by side

3.5 by 64 by 6
Name in KenyaThree-quarterDouble
Size in cm107 × 183122 × 183
Size in inches42 × 7248 × 72
Best forOne adult, teen, studentOne adult who spreads out; occasional couple
Width per person if two share54 cm61 cm
Smallest room (bed against wall)167 × 243 cm182 × 243 cm

Which one to choose

Not sure your room fits? Use the bed size calculator.

Questions

What is the difference between 3.5 by 6 and 4 by 6?

Width. A 3.5 by 6 is 107 cm wide and a 4 by 6 is 122 cm wide, so the 4 by 6 is 15 cm (6 inches) wider. Both are 183 cm long.

Can two people sleep on a 4 by 6 mattress?

Yes, but each person gets about 61 cm, less than a single bed. For couples every night, a 5 by 6 is better.

Is 3.5 by 6 a single or double?

Neither. It sits between them and is called three-quarter in Kenya.

Still have questions? Our team is here to help.

Message the model and size on WhatsApp or call 0702 413 400. We reply with availability and delivery for your area.

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