Anita, Does the door open inside or outside.? Its a small area you may need to buy the sanitary fittings appropriately. You can use this attached layout if the door open insides. Thanks, Nitin Cornerstone Designs, Bangalore.

also, avoid veneer in bathrooms as Veneer sheets are softer than laminate sheets. Once the polish layer wears off over time, the veneer becomes susceptible to abrasions. The veneer sheet may bubble or warp if moisture seeps into the core material or if the top layer is exposed to heat. So they are not great options for kitchens, bathrooms and other wet areas.

Also, I would like more counter space. What size of the sinks should I get? 18 inch? Thank you.

You are in tight spot in terms of dimensions of the Guest bedroom, there is not much flexibility except for the pantry outside room which can have an additional wash basin as suggested by Nitin from corner stone above. Although, since its guest bedroom, TV viewing might not be priority unless you are looking to use it as your entertainment room for family. If you are planning to use it as entertainment room, then, instead of full fledged wardrobe you can have long wardrobe wall unit upto 2'-9" height for storage & TV/entertainment arrangement & play around the space above. In this case, you need to shift electrical & cable points to wall marked for wardrobe.