The curved-flap bag gets its appeal from a soft, rounded silhouette and a short shoulder strap that tucks close to the body. A small piece of metal hardware adds a point of shine without needing a logo.

A half-moon curve, rounded flap and compact shoulder strap make the shape easy to spot. Hardware can be discreet or sculptural, depending on the mood you want.

The first group leans into that rounded outline. The Madewell Dakota in black pebbled leather has a sculpted metal detail on the flap and an adjustable strap. The Vince Eris pairs suede with smooth leather, which I would wear with a camel coat. The TAH Camila is a structured black shoulder bag with brass hardware, and the MASCARO in tan comes with a short strap or a long one. The Kurt Geiger Chelsea in green adds a chain strap and an eagle-head clasp, which is a lot of personality for October.

Practical tip: hold the flap shut and look at the curve from the side. A well-made bag keeps a clean, rounded edge without puckering at the seam.

Half-moon bags use a curved base and smooth top line for a clean, easy shape. A structured flap gives definition, while a softer body feels more relaxed.

The AllSaints Rosalie is a small black leather half moon with gold-tone hardware and an adjustable strap, so it sits close to the body. The Tory Burch Romy is tan suede with a slim strap that I would wear with a long wool skirt and flat boots. The Kate Spade Liv is slouchier, with a single strap on gold-tone rings, which suits a weekend bag. The Strathberry Mini Crescent in burgundy is calfskin with gold bar hardware and a chain, handcrafted in Spain, and it is the one I would pick for a dark autumn coat. Staud's Mini Moon in glossy black has a wrapped handle you can carry by hand.

Pick a strap length on purpose. A short strap tucks the bag under the arm, while a long one turns it into an everyday crossbody. Check that the strap hardware is solid and does not rattle.

What I would skip: the leopard nylon crescent if you are after a polished leather finish. It is lovely and washable, but better suited to casual days.

Denim and canvas bring a lighter, more casual feel to curved-flap bags. For October, I would call them light-layer fabrics.

The True Religion denim saddle bag in light blue has a curved flap and a small metal horseshoe detail. The Chloé Small Marcie in cream canvas has a rounded flap and gleaming hardware. Stoney Clover Lane's convertible bag in tan canvas has brown trim and buckle straps. The two Polo Ralph Lauren denim bags are softer and rounder: the mini converts to a croissant shape, and the small has a double-pillow gusset. The JW PEI Aria in natural mesh canvas, with smooth leather trim, is the airiest of the lot.

Test the fabric where it bends. Fold the flap and look at the crease, since canvas and denim should spring back and the trim should sit flat. Rub the edge paint of any faux leather trim with a thumb.

What I would skip: the olive Mango canvas hobo if you want a defined flap. It is a good slouchy bag, better suited to a softer silhouette.

Embroidered canvas totes pair an uncomplicated shape with colorful, detailed stitching. They work well as everyday carryalls, and the decoration can be bold or subtle.

The Lauren Ralph Lauren Camryn in navy has needlepoint-inspired dog embroidery on sturdy canvas, with a top zip. Kurt Geiger's Sloane shopper has scattered summery embroidery and red handles, while the Holborn is teal with a patch, crystals and beads. The Ame & Lulu Mini Nantucket tote in natural canvas has teal, blue, orange and pink scalloped trim up the handles, and the Mini Country Club has crossed tennis rackets stitched on in navy. Celandine's Hartley is beadwork, with an oyster and a lobster on cream. The mix runs from playful needlepoint to polished patchwork, so there is room to choose a motif that suits your style.

In the fitting room, run a finger over the embroidery. Stitches should lie flat and the back of a panel should look tidy. Then load the tote with a laptop and see if the handles hold their shape.

What I would skip: a drawstring top, like the one on the Favorite Daughter Morgan, if you want an open tote. It is neat, just a different feel.

Bag charms add a small moving detail to a strap ring, with a glint of metal, color or texture.

Coach's Cherry charm is a pair of glittery cherries on a gold-tone swivel hook. Marc Jacobs' Grommet charm is a silver-tone chain with a key, a star and a pearl. The AllSaints heart in black lamb leather has tassels and a carabiner clip, and Kate Spade's floral charm trails pink appliqués. Kurt Geiger's faux-fur eagle mascot is the loud one. Tory Burch has a red patent ballet flat and a leather strawberry, and Madewell's woven leather tomatoes are a very specific kind of charming.

Clip a charm to the strap ring, not the flap. The flap has to close and lie flat, and a heavy charm will pull it open. Check the clasp too: a swivel hook or carabiner with a spring that snaps back firmly is worth having.

What I would skip: stacking more than two charms on a small bag. One bright charm reads as a decision.

I would start with shape. Choose a rounded flap, a half-moon base or a soft crescent, then decide whether you want a short shoulder strap or a longer crossbody.

Then I would pick the fabric for the season. Leather and suede for coats, denim and canvas for a sweater and jeans. Add a charm last, clipped to the strap ring, and test that the flap still closes.

The appeal of these bags is the balance of a soft curve and one well-chosen detail. I would keep my own version in black leather and let the charm do the talking.

If the Dior Saddle bag is on your list, I think these curved styles are worth considering too. If you want to keep browsing, I also put together Mirumi Bag Charm and Gucci Jackie Bag Dupe.