I've found the swaddle handy during the day when moving baby from bed to buggy etc, it is much easier as it stays put/doesn't bunch up/come up wrapped like fabric wraps do
Size 0-3 Months
Shoulder Neck to Crotch - 47cm
Chest - 21cm
Shoulder Neck to Crotch -53cm
Chest - 30cm All sizes are approximate and measurements have been taken with garment on a flat surface.