Where can we buy an affordable and with high quality car floor mat in BKK? Thank you!! 

High quality comes with a price...

You never said the type of floor mats you are looking for nor for which vehicle.  Rubber mats for a cheapo pick up or wool carpets for a Bentley ? Not that I guess you have a bentley but just used it as an example that you need to be very specific in what you are looking for.

1 hour ago, Kim93 said:

Where can we buy an affordable and with high quality car floor mat in BKK? Thank you!! 

Got mine from a car accessory stall at a Big 'C' store.

I simply bought square mats and used the old ones as a templete and cut them with scissors.

If the OP wants the best then ask the car brand dealer for "genuine" parts catalogue...

If the OP wants the best then ask the car brand dealer for "genuine" parts catalogue...

But he did say affordable !!