This pattern works in continuous rounds unless stated otherwise. Use a stitch marker to signify the start of your round.

Materials:

• Crochet hook that is suitable for your yarn. Use a smaller or bigger hook to size your sleeve up or down.
• Your preferred yarn. I use Scheepjes Softfun with a 3.5mm hook.
• Sewing needle, sewing thread, stitch markers, scissors, button

Yarn colors:
There are two options for making this sleeve. You can create the whole sleeve plus envelope flap in one color and then two colors for the flower (I prefer yellow and brown for a sunflower but you can use any two colors). Or you can create the sleeve in one color and the envelope part in a second color.

Abbrevations
This pattern is in US terminology and very beginner friendly.
SC = single crochet
INC = increase
DC = double crochet
sc2tog = crochet two together
TC = treble crochet
slst = slip stitch