Kesa Gatame is a basic scarf hold, most identifiable with one of the arms of the "attacker" around the opponent like a scarf.
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Kesa Gatame, which is short for Hon-Kesa-Gatame, is often taught in classes as the first Judo pin. The Tori (Person executing the technique):
First sits with his back facing the partner's chest, in the location of the partners armpit.
Right hand goes around the partners neck, grabing any area of the uniform
Left hand places the partner's arm into the armpit area, to secure the hold
Legs are spread out to increase the surface area of the hold
Head faces down to lower the center of gravity.