8.75 would be fine to it's only a difference of 3 inches.. Are you going to do up lighting? In the second picture that ceiling is really set up for it and that opens up a lot of options on your finishes and textures on the ceiling.

I have 300 sq.ft bedroom, then it have double sized bed,one alamaara,one round shaped table,cooler,chair,table fan and final cloth hanging.how can i arranged?

help me regarding the design of my furniture (bed and headboard,cupboards and dressing table which sheet should i use for it , and suggest me which colour should i paint to my walls , presently i dont like the paint of my walls , how should i paint ,should i paint four walls same color or should i use different colors for the walls

Here is an idea: