I like the 12x24 size. It looks current. Either will be beautiful. Stand on pebbles with your bare feet before committing. Travertine is a natural stone and will need sealing annually or more often. In my own shower, I'll use a small porcelain mosaic for the traction and affordability. Marble would be beautiful. My opinion is the wood look tile should be laid plank style.

Silver Shadow is gorgeous, you'll love your shower!
I like the 6"x18" size in your shower. For some reason I feel that the larger size might overwhelm the floor tile, and we've seen so much 12"x24" that different size will feel more special.
I had a tile shower with a pebble floor and found that the grout required a lot of maintenance (the joints are much wider than usual), it has made me think twice about that as an option for shower floors. I'd look to a matching marble mosaic as a shower floor option.
Will you be incorporating other colors in the room that you could work off of for your accent tile?
I think advira is correct, the wood plank will look best laid in staggered joint pattern.
Best of luck!

I think somehow the picture of the shower didn't attach. Sorry! Also attached to this is a picture of what the vanity will look like (or at least close to that). I haven't really picked any colors as I tend to go neutrals. I have warm neutrals everywhere else in the house so I'd likely paint the walls some shade of beige, but no decision yet.

This is a gorgeous Silver Shadow basketweave mosaic that you could easily use for both your shower floor and accent tile.
I like that it is a subtle, classic pattern, and they've added a beige dot to warm it up a bit which works well with your paint ideas. The beige/brownish dot will also help your floor tile color tie in to the shower.

Do you have a link for this?

Here's a link http://www.tureks.com.tr/product/silver-shadow-polished-31x31-1x2-marble-mosaics/
I'm not familiar with the Tureks company, but a local tile showroom should be able to find you something similar.
Good luck!

Use the mosaic for floor of shower - the extra grout lines are great. Do the wood tile floor in herringbone and then the shower - what if you did a herringbone in the stone on the back wall above the seat with the smaller scale silver shadow but used the larger tile in a running bond like subway for most of the shower? Then you have a herringbone floor, and a feature wall in herringbone that ties it all together . . If you do use the larger ones, consider on grid paper how to lay out every horizontal joint so things line up - if you have a curb, that might be your first "base" joint height . . . then the 1' leaves something at the top, you could use the 6x18's as a frame if need be . . think ahead with grid paper - you can take the time to make a great result - larger slab on seat / face of seat / side wall . . . .

Herringbone for the floor.

jagwyre have you made progress on your project? Just curious to see how things are coming along. Hope it is going well!

Thanks for asking! We actually ran into a huge snag today. They came to install the shower bench and curb and they brought the wrong stone! The installer swears it was from the same series as the slab I saw (which he said he couldn't buy because of staining on it). But what the brought today is a slightly different color and a totally different veining pattern. I'm super upset. Tile installation was set to start Saturday morning. The stone installer said to go ahead and have them tile but to just leave the tiles off that butt up against the stone until we get the issue resolved. Not sure if that is a good idea or not. This is so stressful!

Oh no, it's always so disappointing to hit a snag in a project!
Since natural stones vary so much in color and veining, it is possible that the stone that was brought is the "same" as what you saw. I hope you are able to get that all resolved soon!
We sometimes start to tile and then have the slab brought in for the seat, it varies job by job for us. As long as your tile installer is comfortable with that route I think it's an ok way for you to move forward.
Hopefully things will move smoothly from here on out for you; I look forward to seeing some pics of the completed shower!

I do realize natural stone varies, however, I saw two slabs that were very consistent with each other, both were a warm gray with white veining. The installer told me he was buying another slab in the series because of the staining issue. I asked him if I needed to come see the slab. He said no, it was the same color and veining pattern as the ones I saw. The stone they showed up with has a green cast and no white veining at all. I'm not sure the difference is really going to show in these pics, but the first is my tile with the slab I picked (and the other slab I saw was just like this). The second pic is the shower seat they installed and the third is the whole slab. I would have been ok with a contrast, but they clashed :(

Oh, shoot. That's not good. How are things coming along now?

Slowly... I went back to the granite yard. The slab he bought was from a different lot entirely, not another cut of the same stone. He's basically giving me a guilt trip about the amount he's spent saying he did nothing wrong.... Well, either he was wrong or the stone yard gave him the wrong piece but either way, it isn't my fault! But I'm having to pay $300 to buy the new slabs (he halved the cost). At this point it is just better to pay the $ than to fight it and screw up my timeline and possibly legal fees. I'm very frustrated. I picked him because of his great reviews. I won't be giving him one.

The correct stone got installed last night. Yay! So happy I stuck to my guns and didn't accept the wrong slab. It looks great with the tile... No clashing :)

That looks great!

Hi I just finished a 5' by 6' shower with subway tiles and pebbles on the floor. We got the sliced pebbles because the small rounded ones were not available when the contractor needed them. I am very happy with them. I also have the basket weave in the main part of the bathroom. Obviously, my colors are different but at least you can see them installed with a smaller tile. Your granite looks beautiful! The pebbles come in lots of different colors. Only caveat to be aware of, if you go with the rounded pebbles or river rock, don't do big whole rocks, get the sliced ones because the bigger stones are uncomfortable on your feet. The small ones are great, but not the big. Also my installer had to take a lot of the sheets apart because you could see where the "tiles" ended and I wanted a seamless rock floor, not one that looked like squares put together. Theoretically they are supposed to fit together like a puzzle but you could see the seams.... Good luck!

Wow, that is looking gorgeous; can't wait to see final pics!

Love it! Especially the wood look tile laid out in the herringbone pattern. It is strikingly beautiful...in a good, classic way.

Wow this looks beautiful! Thanks for sharing your progress with us!