Cut your transfer tape so that the bottom of the transfer tape touches the bottom of the object you're applying labels to - in this case your spice jar - and so that the top of the transfer tape would touch the spot where you want all your labels to start. This way you always know to line the top of the transfer tape with your label when you add the transfer tape to it. Then when you apply the transfer tape to your object, you always line the bottom of it up with the bottom of your object. You can use the shape of your transfer tape as a guide.