BluSoak Stakes - Mega - (Bulk) Single Hold-Down Clamp
BluSoak Drip Tape, Mega by the bulk, purchase whatever quantity you want. The are cheaper than most stakes found on the market but work much better for holding down soaker hose / drip tape.
They also do not rust because they are made of high quality plastic rather then metal.
Approximately, 5" tall, and 1" wide.