French Martingales are leash/collar combos. They are one piece martingales and are useful for fast on and off without extra hardware. Interchangeable panels mean you can wear in the leash how you like it but still upgrade your style often.
Leashes are 3/4in wide. This is a set width at this time.
Wide Bases leash/collar combo bases are 2in reduced to 3/4in wide. Wide base with a border is 2.25in. Wide base with padding is 2.25in. Wide base with a border and padding in 2.5in wide.