Transition from Hardwood to Marble Tile (1/4" lip)???
I assume you want a wooden transition piece. I have a very similar situation at my house, where I transition from 3/4 inch oak hardwood up about 3/8 inch to stone tile. I made my transition pieces from 3/4 inch thick oak stock, about 3-1/2 inches wide. I cut a 3/8 inch thick rabbet about 1 inch wide, and cut a 45 degree bevel on the hardwood side. Then I finish nailed the transition piece in place, filled the nail holes, oiled and varnished. Looks fine.
You can buy prefinished transition pieces with varying rabbets at a decent lumber supply place if you don't feel like cutting them yourself. If you can't get exactly the rabbet you need, you can always adjust the size using a straight router bit, a dado on a table saw, or even a chisel if you are really good with one.