A standard 1-liter freezer bag typically measures approximately 18cm x 20cm (roughly 7 x 8 inches) when laid flat. In 2026, many major brands like Ziploc or Glad offer "stand-and-fill" versions that might feature a gusseted bottom, which changes the functional dimensions to about 17cm x 15cm x 5cm to allow the bag to remain upright. These bags are specifically designed to meet international airport security "liquids rule" requirements (the 3-1-1 rule), which mandates that all cabin liquids must fit within a single, transparent, resealable bag of this 1-liter capacity. The plastic thickness for a "freezer" grade bag is usually around 0.07mm to 0.09mm (70–90 microns), which is significantly thicker than a standard "sandwich" bag. This extra thickness provides a better moisture barrier to prevent freezer burn and makes the bag durable enough to be washed and reused multiple times, a common practice for eco-conscious travelers in 2026 looking to reduce single-use plastic waste during their journeys.