We can find below router/AP for Mesh network implementation.
https://madeby.google.com/wifi/how-it-works/
https://www.netgear.com/home/products/networking/orbi/?cid=FB_Q12016_20
http://www.linksys.com/us/velop/
For RouterOS:
Q1: How many minimum device for Mesh Network ?
Q2: Which Wireless WDS Mesh model equals to above products ? http://wiki.mikrotik.com/wiki/Wireless_WDS_Mesh
- Model 1 : Wireless WDS Mesh With Mesh Interface
Model 2 : Wireless WDS Mesh With Bridge Interface