i've done countless times of bleeding brakes with a short clear tube that doesn't fit right on the bleeding valve. A lot of brake fluid drops on the floor.
what size of clear tubes and clamps should i get for BOTH front and rear so that they sit tightly? i believe front and rear have different bleeding valve size.

 

You can get clear tubing at a local hardware store.. it is very cheap. Pick one or two that look closest to your needed size.. get about a two foot section, or longer, as needed.

Another option is a pet/fish store for air tubing - this tends to be pretty thin and flimsy - more difficult to get over the valve. Use needle nose to insert and widen sometimes helps.