GE

• GE top-freezer refrigerators sized for small spaces include the GTR10HAXRWW, a 10-cubic-foot model that measures 23 1/4 inches wide, 60 inches high and 26 inches deep. This Energy Star-rated appliance uses 386 kilowatt hours of electricity annually, costing you $41 to operate. With measurements of 23 1/4 inches wide, 60 inches high and 29 5/8 inches deep, the GE GTR12HBXRWW and GTL12HBXRBS and can also save space. They have 12 cubic feet of capacity and consume 412 kilowatt hours each year. Expect to spend $44 annually to run these models as of 2011.
  
  

Whirlpool

• You get 9.6 cubic feet of space in the Whirlpool ET0MSRXTL, ET0MSRXTD, ET0MSRXTQ and ET0MSRXTB models, which have a top-freezer design. These appliances stand 24 inches wide, 60 3/8 inches high and 26 7/8 inches deep. They use 386 kilowatt hours of electricity, which translates to an annual operating cost of $41.
  
  

Frigidaire

• There are four apartment-sized refrigerators in Frigidaire's product line, each measuring 23 7/16 inches wide, 59-7/8 inches high and 26 inches deep. The FFPT10F0KV, FFPT10F0KV, FFPT10F0KB and FFPT10F0KM provide 9.9 cubic feet of capacity and use 386 kilowatt hours of electricity a year. They have an annual power cost of $41 and top-mounted freezers.
  
  

Haier

• The Haier HRF08WNDWW offers 8.1 cubic feet of capacity in a top-freezer design. This product is 23 1/2 inches wide, 50 7/8 inches high and 26 5/8 inches deep. It consumes 370 kilowatt hours every 12 months, costing $39 a year to run.
  
  

Avanti

• The top-freezer Avanti FF1008W and FF1009PS provide 10 cubic feet of capacity. They stand 23 1/4 inches wide, 60 inches high and 26 inches deep. It costs $41 a year to provide the 386 kilowatt hours they require.
  
  

Danby

• Buyers get three apartment-sized, refrigerator-freezer models to choose from in the Danby lineup. They include the DFF261BSLDB and DFF261WDB, which have a bottom-mounted freezer and 9.2 cubic feet of room. They are 23 13/16 inches wide, 59 13/16 inches high and 26 3/4 inches deep. These appliances use 405 kilowatt hours annually, giving them an operating cost of $43. A model with the same measurements is the Danby DFF280WDB, which has 10 cubic feet of capacity. This top-freezer model needs 312 kilowatt hours to run for a year, amounting to $33.