Artist Portfolio Bag, Premium, Black Cloth, Quarter Sheet

An art portfolio bag exists to move large sheets without folding them — and a fold in a finished drawing or a sheet of watercolour paper is permanent. A flat carrier is the difference between work that arrives ready to show and work that arrives creased down the middle.

Size it to the largest sheet you actually carry, not the one you carry most often — a portfolio one size too small forces the corner fold you bought it to avoid. Load it flat rather than upright so the sheets rest on the long edge, and slip a sheet of board in with thin paper, since a soft bag protects against creasing but not against a knock. It doubles as flat storage at home, which is where most drawings are damaged rather than in transit.

The premium quarter-sheet bag in black cloth. At this size the upgrade over the standard version is mostly in the zip and the handles — the parts that fail first on a bag a child opens and closes every day — rather than in the size, which is identical.

• Quarter sheet — for 35x50 cm paper
• Black cloth, premium make
• Carries sheets flat, without folding
• Load flat and slip a board in with thin paper