Fold the 18-inch strip in half.
Insert the pin exactly in the middle of the fold line
Unfold and position the pin with the tip facing you. Find one end and insert it in the pin like in the image below.
Do the same on the other end but in the opposite direction. You will get an 8 or infinite symbol
Then insert the middle of each loop in the pin like this:
Now holding tight the ribbons take out the pin and insert it in the same place but crossing it like this:
Using the thread or thin ribbon make a knot around the center of the bow like in the image below:
Remove the pin.
Do exactly the same process with the 15 inches ribbon.
Place the patterned bow over the solid one and tie a knot with the remaining thread or ribbon to keep them in place.
Secure both bows with hot glue {sorry about the blurry pic}.
Cut the excess of thread or ribbon.
Find the 5 inches ribbon strip and make a knot in the middle.
Place it in the middle of the bow to hide the other ribbon or thread.
Glue both ends on the back.
Find the 1 inch strip and burn a little bit the ends to avoid fraying.
Glue it to the back of the bow.
And finally glue the barrette clip.
Repeat process with another hair bow if you want them to be twins.
Let your girl wear them with pride. Lucky her!