These are made so you can change up the configuration and make one side longer as you like. Details from the manufacturer:
 
Brand Legend Vansen
 
Minimal Assembly Required
 
Seat Height 18.9 Inches
 
Weight Limit 1600 Pounds
 
Product Dimensions 82"D x 106"W x 35"H
 
Item Weight 279 Pounds
 
Leg Length 5 Inches
 
Type Sofa Chaise
 
Color Dark Grey
 
This modular sectional with Chaise is the unique design for all sofa lovers who would like to build, mix and match for their own preference. It really benefits the person who would like to build and fit into the desired space. It is built with quality material for lasting use
 
【Easy Assembly】: This sectional sofa is composed of a sturdy constructed wood frame with durable fabric. Seat cushions are filled with high-resiliency sponge and inner spring for durability and comfort.
 
【STURDY CONSTRUCTION 】: The wood frame is designed for everyday use and lends durable support to this contemporary living room collection，Foam padded cushions overstuffed with down feathers and cotton offer a luxurious sink-in feel Comes with 3 throw pillows as shown.
 
Brand
Legend Vansen
Assembly Required
Yes
Seat Height
18.9 Inches
Weight Limit
1600 Pounds
Product Dimensions
82"D x 106"W x 35"H
Item Weight
279 Pounds
Leg Length
5 Inches
Type
Sofa Chaise
Color
Dark Grey
Special Feature
Storage