Timbuk2

www.timbuk2.com
Hip nylon messenger bags.
We bought: A small custom classic messenger bag with a center divider and a cell-phone holster for $105.

How to Navigate: Click on "Build Your Own Bag" on the top left side of the home page, choose a size, and complete four more steps. Then view an image of your bag from every angle.

Make It Yours: Select size (small to extra-large), fabric (ballistic or Cordura nylon), color (up to 22 choices), configuration, features (like that center divider), and accessories.

Returns: You're entitled to a return (for merchandise credit) only if there is a defect.

L.L. Bean

www.llbean.com
Sturdy and colorful book, tote, and messenger bags.
We bought: Custom Super Deluxe Bookpack with monogram, $70.

How to Navigate: Type "custom" into the search field on the upper-left-hand side of the home page. Select "Custom Super Deluxe Book Pack" to get started.

Make It Yours: Choose the colors for no fewer than seven different parts of the bag — from the reflective panels to the zipper pulls. Monogram it for $5.

Returns: Returns are unconditional. Return by mail or at L.L.Bean stores.

1154 Lill Studio

www.1154lill.com
Cute pocketbooks handcrafted in Chicago with colorful, feminine fabrics.
We bought: Custom Lynn purse, $90.

How to Navigate: Click on "Design Your Own" on the left side of the home page. Once you pick a bag shape, you can review the dimensions, the customizable parts, and the price.

Make It Yours: From 25 bag styles, pick the fabric for the body, pockets, interior, and straps. Click on the regularly updated "Fabric Palette" to view dozens of options for each.

Returns: Review your fabric choices carefully; the company doesn't accept returns on custom orders. (Soon, however, new software will allow you to see what your bag will look like.)

*Customer pays the return shipping unless otherise indicated.