SkechersUltra-Flex - Statements Womens Sneaker

What is the difference Between this one, and the wave lite sketches

Is there any big difference between the 7M(B) US and the 7US? There’s no 7 and the only option I get as 7 in the color I want is the 7M(B).

Please try to find out the size of the 39.5 fits any measurement in the size of the foot

How many inches is the heel?