Fabrics:

• 2-3 exterior fabrics each about 25cm (10")
• Lining fabric about 1m / 1 yard ("Variation B" 50cm / 1/2 yard)

Interfacing (based on 90cm (35") width):

• 25cm (10") of lightweight fusible interfacing
• 25cm (10") of medium weight fusible interfacing
• 15cm (6") of low loft fusible fleece
• 25cm (10") of heavy fusible stabiliser

Additional:

• 15cm (6″) webbing 20-25mm (3/4″- 1″) (strap connectors)
• if necessary 2 square or d-rings 20-25mm (3/4″- 1″) wide
• about 100-130cm (40″- 50″) strap 20-25mm (3/4″- 1″) wide (e.g. webbing, leather strap, bag chain, thick cord)
• Bag closure (press lock, twist lock or similar)

Optional:

• 55cm (21 5/8") nylon coil zipper, 3cm wide (#5) + 2 sliders
• 11cm (4 5/16") nylon coil zipper, 2.5cm wide (#3) + 1 slider
• 10cm elastic band about 1cm (1/2″) wide (as pen holder)
• 1 snap fastener (for divider closure)
• 1 swivel hook 20mm (3/4″) + piece of ribbon (key holder)
• 2 swivel hooks 20-25mm (3/4″- 1″) wide (for strap)
• if necessary 1 strap adjuster 20-25mm (3/4″- 1″) wide
•  2-4 rivets or Chicago screws (leather strap)
• 2 eyelets 6-8mm (1/4″- 3/8″) inner diameter (for bag chain)