Petite sleepers usually prefer a plusher mattress feel while heavier adults do best with firmer support. This can make it hard – but not impossible! – to find a mattress that works for both sleep partners. Your best bet is a customizable, dual-firmness design such as the Serenity or Serenity Spring from Savvy Rest, the EOS from Naturepedic, the Botanical Bliss from PlushBeds, or an Obasan mattress.