Do you have a decent tile store in your area? The one I used helped me with a design plan for my space and I didn't pay anything until I was ready to purchase the tiles and that was about a 9 month difference in time. The tile layer also offered suggestions at the job site. You have very good questions but if you can find the right store you may find the process to the answers very quickly and painlessly.

Take a look at photos.. a good place to browse for inspiration is at houzz.com, or photos of finished bathrooms on this site.

1) There are 2 schools of thought on floor tile size in a small space. You can do either way. I just did a small bath and used large-format tiles (12 x 18; I used 12 x 24's in my master bath pictured below) and some folks like to do little mosaics. It also depends on the style you are going for.

2) Accent tiles are a great way to use that gorgeous and pricey tile you love but can't afford to use everywhere!! I used $30/sf calacatta marble mosaic as accent tile with $2-$3/sf field tile (the tile that covers most of the wall or floor is field tile). You can use it in a stripe or pattern on the wall, or you can use it in shampoo niches in the shower and tub areas, or as a border around the floor. Again, take a look at photos for ideas...

3) Whatever you want! Some people use tiny mosaics (we have 3/4" glass mosaics in our master.) Some use large format tiles (see wi-sailorgirl's recent photos on this forum); less grout lines to clean! Some use regular 4x4s. The bath I'm doing now uses inexpensive 4x4s laid in a running bond, or "brick joint" pattern.

4) Tiling to the ceiling is more expensive. Do you mean at the tub or throughout the room? If you do the whole room, you get a cozy, jewel-box effect in a small bathroom. We tiled around the room up to wainscot height. You don't need to go all the way up in the shower/tub area, just up to the showerhead, but some people like to see tile all the way to the ceiling there.

5) I would! I think the floor and walls are different things, architecturally, visually, and emotionally. I personally think it feels too institutional when floors and walls are the same tile. It can be cool, especially in a very modern setting, but I prefer different tiles on the walls and floor.

Some photos of our master bathroom. Here's a niche with accent tile, and small glass tiles on the walls and tub deck/apron:

Here you can see large format tile on floor

Here's a completely different style. This is another GW-er's bathroom, with small-scale floor tile (marble basketweave) and subway tiles on the walls. She used the fancier trim pieces to edge her subway tiles.

And here's wi-sailorgirl's bath showing large-scale tiles on the walls and a great use of accent tiles :)

Here is a link that might be useful: [Houzz.com bathroom galleries for inspiration[(https://www.houzz.com/photos/bathroom-ideas-phbr0-bp~t_712)

Whoa, Stacey, thank you!! I really appreciate the pictures you included in your post, and the link, too. It sounds like I can just pick whatever I think looks nice, huh? Thanks also for sharing your thought process with me. That was exactly what I was hoping for!!