These bookmarks start out with a rectangular double-sided piece of cardstock.  Then I layer different papers-including some from antique hymnals and old religious books-making sure to leave space for the scripture.  I will also use antique hymnal paper on the backsides.  When they are complete, I then laminate using 5mm laminate plastic.  It is thicker with a professional feel.  And it will protect them and keep them looking like new, even when you overuse them in your bible…Feel free to copy and paste them if you want!