This is not a physical product it is a digital pattern
For flowers the yarn is used, the mercerized cotton, the brand - Yarn Art
"Violet" 280m/50g, and a hook size 1.3 mm.
The thread in gold is Yarnart
"Bright". For various colors, it also uses cotton yarn,
brand - Madame Tricote "Maxi"' Since the named yarn is thin, the flowers have a size from 1.5 cm to 3.5 cm (0.6-1.4 inches).
Accordingly, for the letter, the size of A4 took from 90 to 120 pieces of flowers.