Please choose the correct ending to complete the given sentence: Travel: [header] How to pack with packing cubes [title] Measure your luggage before you purchase a packing cube. [step] Use a tape measure to take the dimensions of your luggage. It's easy to estimate the size incorrectly and end up with packing cubes that are wider than your suitcase.

Ending1: To avoid this, always make sure to check the packing cubes' dimensions and compare with your luggage before purchasing. [title] Use smaller cubes for toiletries and accessories. Ending2: If you're packing long-distance flights or camping, you'll need to see the size of your surroundings before you have to pack. [substeps] Estimate your height and width by using a tape measure and measuring tape. Ending3: Record any measurements you take as a millicopy, cube, and sizing chart for a later reference. [substeps] The same can apply to travel cubes if you pack your traveler's bag or backpack. Ending4: Most packing cubes come with a " height " measuring device, which helps with sizing. [title] Buy packing cubes that are 4 " x10 " or larger.

Answer format: ending1/ending2/ending3/ending4