I am an advocate for weaning the Montessori way, with a weaning table. A weaning table is traditionally used from around six months, often as a replacement of a high chair, at which the infant sits to have their first solids. While there is a lot of advice around about Montessori weaning tables it's great to see real ones, in action, being used by real children!!
This is a good article DIY Weaning Table - Ikea Hack at Bread & Roses. LePort Schools has some wonderful images of their weaning tables in their photo gallery. There is also a cute article about the weaning table here at Bluebird Kisses.
If you are looking for a suitable table and chair there is no one simple answer. Some Montessori stores will sell matching table and chair sets while there are many more creative options out there. I hope you get some ideas from some of these links, each table is beautifully unique.