The POV is very close to the sand (as you can see from the sand grains), so the first ripples' field is only a few meters across. The ripples are about 5 cm wide/high, but you're right; there could be more 'blend'. Although you sometimes see huge fields of quite similar ripples in desertscapes.
@ Henry; no these are just 'get position-x to scaler-divide by constant-sinus-warped by X-redirected PF' ripples.