Paper Bag Types and Formats

A technical overview of common paper bag constructions for retail and packaging buyers.

Paper bags for retail applications are manufactured in a range of structural formats, each designed around specific load requirements, presentation contexts, and filling methods. Understanding the distinctions between these formats allows buyers and packaging teams to match bag construction to merchandise and channel requirements.

Flat and Satchel Bags

Flat paper bags are the simplest construction in the category. They consist of two plies of paper sealed along three edges, producing a pocket with no gusset or expanded base. Because they cannot stand upright on their own, flat bags are best suited for slim, lightweight items such as documents, photographs, cards, or flat soft goods. They are typically filled and closed at the point of sale by folding or tucking the open top.

Self-opening-satchel bags, widely referred to by the abbreviation SOS, represent a structurally more capable format. The SOS construction incorporates a flat, rectangular bottom panel that unfolds automatically as the bag is opened, allowing it to stand without assistance. Side gussets expand to accommodate volume, making the format practical for groceries, baked goods, and general merchandise. The squared base also distributes weight more evenly than flat-bag alternatives, improving carry stability for heavier loads. The kraft paper that most of these bags are made from is described at https://en.wikipedia.org/wiki/Kraft_paper.

Handle Styles by Format

Twisted-handle shopping bags are among the most widely recognized retail formats. The handles are formed by rolling strips of paper into a rope-like cord, which is then looped through reinforced holes punched near the bag's open edge and knotted on the interior face. The twisted construction creates a comfortable grip and projects a finished, upscale appearance, making this format common in specialty retail and boutique environments.

Flat-tape-handle bags substitute a ribbon or flat-cut paper strip for the twisted cord. The tape is typically adhered directly to the interior surface of the bag rather than threaded through punched holes, which simplifies assembly and lowers production cost. The resulting handle lies flat against the bag when not in use, which can be advantageous for stacking and storage.

Die-cut bags, sometimes called patch-handle bags, have handles formed by cutting an opening directly through the top portion of the bag wall itself. A reinforcing patch of paper or board is laminated to the interior surface around the cutout to prevent tearing. This approach eliminates a separate handle component entirely, reducing material cost and assembly steps, and is common in grocery and food-service retail where speed of filling and low per-unit cost take priority. Custom shopping bag formats are detailed at https://sites.google.com/emeryeps.com/vslpackaging/packaging/bags/shopping-bags.

Merchandise and Specialty Paper Bags

Gift bags are distinguished primarily by proportion and finish. They are typically taller relative to their depth than standard shopping bags and are designed to hold tissue paper and boxed or wrapped items. Reinforced bottoms are common, as is a higher-grade paper stock with surface treatments such as matte or gloss coating, embossing, or foil lamination. Handles on gift bags are most often twisted paper or ribbon.

Wine bags are a specialized vertical format engineered to enclose a single bottle standing upright. The proportions are narrow and elongated, and the base is sized to match standard bottle diameters. Some constructions include an interior divider or cushioning insert to limit movement during carry.

Bakery and grocery paper bags cover a broad range of formats defined primarily by practical function. Bakery bags are often ungusseted or lightly gusseted flat bags used for individual items such as loaves, rolls, or pastries. Grocery formats lean toward the SOS construction, with kraft paper weights selected to support the anticipated load. Some bakery applications use glassine or grease-resistant paper liners to prevent oil migration through the outer bag wall.

Sizing and Proportions

Paper bag dimensions are conventionally described using three measurements: width, gusset depth, and height. Width refers to the face dimension of the bag as it lies flat. Gusset depth describes how far each side panel expands when the bag is open, which directly determines interior volume. Height is measured from the base to the top edge, not including any handle length.

Matching bag size to merchandise involves accounting for both the physical dimensions of the product and the experience of filling and carrying. Bags that are too shallow relative to their merchandise may not close cleanly or may require awkward overfilling. Bags that are disproportionately large relative to their contents present poorly at point of sale and add unnecessary material cost. Buyers often work from a set of standard size increments offered by their supplier, selecting the smallest format that accommodates the intended contents with a reasonable margin.

Handle placement and height interact with overall bag proportion in ways that affect usability. A bag that is tall relative to its width requires a longer drop from handle attachment point to carrying hand, which influences comfort. For shopping bags intended to carry heavy loads, the relationship between bag height, paper weight, and handle gauge should be evaluated together rather than as independent variables.