Mattresses -
Dave's Furniture World
Mirab (furniture store)

Other furnishings - Mirab main store, Hofius (check the upstairs for suprizing and really nice items), Daves, Treasures.

In San Pedro - "Full House" - bed, bath, decorative pillows etc. New, good taste, growing stock. Located next to Island Super Market.

Decorator items galore - Belizean Arts

Mirab now has excellent couches, love seats etc. - really good prices, good quality and style.