I just bought the KIVIK one-seat sectional sofa with chaise from Ikea and have lost the manual. Does anyone know how to assemble this product?

How to choose left or right facing sectional?
This means that as you are facing the sofa, the arm is on the side mentioned. Right-Hand Facing: If you are standing facing a sectional and the chaise is on the right, it is a right-hand facing chaise. The arm of chaise is on the right, because the sofa continues to the left. http://www.modgsi.com/Sectional-sofa-Left-hand-Facing-vs-Right-hand-Facing_b_1.html

Ikea has online copies of every product manual. Here are the assembly instructions for the product you have -

http://www.ikea.com/assembly_instructions/mavas-entertainment-centre-160x150cm__AA-338653-3_pub.PDF

No need to worry, Ikea keeps online copies of all assembly manuals online. I found the one you are looking for - http://www.ikea.com/assembly_instructions/tidafors-armchair-2--and-3-seat-sofa__AA-492178-3_pub.PDF

Ikea's website has dimensional information for every product they sell. Here are the dimensions you asked for: width 190cm, depth 95cm, height 83cm.

There is no need to drive back to the store. Ikea has downloadable copies of all assembly instructions online. It seems the product that you bought has 2 parts to the manual, one for the frame and a second one for the cover. Here they are:

http://www.ikea.com/assembly_instructions/karlstad-armchair-so2-so3__AA-231512-5_pub.PDF

http://www.ikea.com/assembly_instructions/karlstad-armchair-so2-so3__AA-231512-5_pub.PDF

There is no need to worry; Ikea has printable versions of all of their manuals online. Here is the one you are looking for - they are 2 part instructions.

http://www.ikea.com/assembly_instructions/karlstad-three-seat-sofa-bed__7FQN04_PUB.PDF

http://www.ikea.com/assembly_instructions/karlstad-three-seat-sofa-bed__7FQN04_PUB.PDF

The Ikea website has copies of all of their product assembly manuals online. I have found the one you are looking for - there are 3 parts to the assembly.

http://www.ikea.com/assembly_instructions/beddinge-sofa-bed-mattress__AA-65114-4_pub.PDF

http://www.ikea.com/assembly_instructions/beddinge-sofa-bed-rame__48ZM02_PUB.PDF

http://www.ikea.com/assembly_instructions/beddinge-three-seat-sofa-bed-cover__AA-203737-4_pub.PDF

The dimensions of this sofa are as follows; width 180cm, depth 163 cm and height 83cm.

The Ikea website has copies of assembly instructions for all of their products. I have copied the link to the manual for your requested product here for you.

http://www.ikea.com/assembly_instructions/vreta-recliner__AA-167545-3_pub.PDF

I think it really depend where the sofa is headed towards and the habits of the people in the house. If you put the sectional in front of the TV, then house members might enjoy laying on the chaise part and watch. Or if someone is into reading a book in the leaving room, they might actually enjoy the chaise.