You can use the 17x11 size or the 19x14 size. If you think this is the absolute largest turkey you are ever going to cook, then I'd go with the 17x11. If you think that you may want to cook a 25 pounder in the future then opt for the 19x14.
a 15 inch oval by 3 1/2 inch deep
A full sheet cake pan measures 16" x 24" x 3"
Well, My first question is why are you greasing a roasting pan ?
An average small roasting pan is about 16.5" long, 12.5" wide, and 2.5" deep. This is an example from Amazon: http://www.amazon.com/KittAmor-80109-Small-Roasting-Pan/dp/B001F7ASYK
To make a roast duck dinner, you will need a roasting pan for the duck. You will also need a sauce pan to cook your sauces and vegetables in.
glass pan
Oven roasting a turkey requires very few tools. You'll need a large roasting pan, a meat thermometer, a baster, a large tonged fork and a carving knife.
One of the smaller roasting pans that you can buy measures 15 1/4" x 11 1/4" x 2 1/4". This is probably the smallest you can purchase for roasting chicken.
If you have a recipe that tells you what size cake pan it will require, take a pan this size, fill it with water, and then carefully transfer the water into the number shaped cake pan. This will show you whether the recipe is the right size for the number shaped pan.
Most models of ovens do not come with a roasting tray. It is a bakeware that you would need to purchase separately. Ovens do, however, come with roasting racks that allow you to place the roasting tray on.
A roasting pan is a form used for roasting things in an oven. They are highly heat resistant, to withstand oven temperatures. Roasting pans are made of metal, borosilicate glass (like Pyrex), silicone, ceramic, enamel, and even aluminum foil. They often have lids which are used to retain heat and juices, but can be removed for browning.
You have to select the right pan size to make sure that the food is cooked evenly. It's the same reason that you need to use the correct sized burner for the right sized pan.
fork, roasting pan, bread machine, microwave, dishwasher, etc...