Does Bookbag use my actual size charts, or generic industry sizing?

Bookbag uses your brand's specific size charts, which you upload and maintain. Generic sizing is only used as a fallback if a product-specific chart is missing.

Can Bookbag handle sizing for products that vary significantly within the same brand?

Yes. Bookbag stores size charts at the product or product-type level, so it can handle differences between — for example — your fitted tees and your relaxed-fit hoodies.

What if the customer's measurements fall between two sizes?

Bookbag presents both options, explains the trade-off (e.g., "the Small will be snug across the shoulders; the Medium will have a little extra room"), and asks about their fit preference before giving a final recommendation.

Can Bookbag recommend sizes for footwear?

Yes. Footwear sizing support is available, including half-size handling, width recommendations (where your product range supports it), and US/EU/UK conversions.

Does Bookbag remember a customer's measurements for future visits?

If the customer is identified (logged in or recognized by email), Bookbag can store their sizing profile and use it in future conversations, eliminating the need to re-enter measurements each time.

Core Support

Give Every Customer a Personal Stylist for Sizing

Bookbag collects measurements, compares them to your size charts, and gives confident size recommendations — reducing sizing-related returns by up to 30%.

Book a demo See pricing

Sizing uncertainty is one of the biggest barriers to apparel, footwear, and accessories purchases online. Customers who aren't sure whether to order a Medium or a Large often abandon the cart rather than risk a return. Bookbag eliminates that hesitation: it collects the customer's measurements, references your brand's specific size charts, accounts for fit preferences (slim, relaxed, oversized), and delivers a confident, personalized size recommendation.

The problem

"Does this run true to size?" is one of the most common pre-purchase questions for fashion brands — and one that leads to enormous return volumes when answered poorly. Generic size charts don't account for fit preference, body shape, or brand-specific quirks. The result: customers guess, order the wrong size, and return it.

Sizing is the #1 reason for returns in apparel — often 40-50% of all returns
Generic size charts on product pages fail to account for individual measurements and fit preferences
Agents fielding sizing questions manually can't efficiently handle volume during launch periods
International customers struggle to convert between sizing systems (US, EU, UK, Asian sizing)

How Bookbag handles it

Step 1

Measurement Collection

Bookbag asks the customer for their key measurements — typically chest/bust, waist, hips, and height — or their usual size in a comparable brand.

Step 2

Size Chart Lookup

Bookbag references the product-specific size chart for the item being considered, accounting for cut, stretch factor, and any known brand-specific sizing quirks.

Step 3

Fit Preference Consideration

Bookbag asks whether the customer prefers a slim, regular, or relaxed fit, and adjusts the recommendation accordingly — not just the raw chart match.

Step 4

Confident Recommendation

Bookbag delivers a clear recommendation ("I'd go with a Large") with a brief rationale, removing ambiguity and giving the customer the confidence to complete the purchase.

Step 5

Cross-Product Sizing Consistency

If the customer is buying multiple items, Bookbag checks sizing across all of them, flagging any product where sizing differs significantly from the rest of the brand's range.

See it in action

I'm 5'9", about 175 lbs, with a 38" chest. Usually wear a Medium in most brands but sometimes need a Large. Which size should I order for the Oxford Button-Down?

Based on your measurements and the Oxford Button-Down's size chart, I'd recommend a Large. The Oxford runs slightly slim in the chest — a 38" chest sits right at the top end of our Medium (36-38") — so the Large will give you a much more comfortable fit through the chest and shoulders without being oversized. If you like a tailored look, the Large still looks sharp untucked or tucked in. Any other items I can help you size?

Why it matters

Fewer Sizing Returns

Confident, accurate size recommendations reduce the volume of returns driven by wrong-size purchases.

Higher Conversion on Apparel

Removing sizing hesitation at the point of purchase increases the likelihood customers complete the transaction.

International Sizing Support

Bookbag handles US, EU, UK, and Asian sizing conversions, making your store more accessible to international shoppers.

Brand-Specific Sizing Knowledge

Bookbag is trained on your specific size charts, not generic industry tables, ensuring recommendations reflect how your particular garments actually fit.

27%

Reduction in sizing-related returns

38%

Of sizing questions answered vs. abandoned when chat is unavailable

2.4x

Higher add-to-cart rate after a sizing recommendation vs. no recommendation

Frequently Asked Questions

Related use cases

Product Questions

Bookbag knows your entire catalog — materials, dimensions, care instructions, compatibility, and more — and answers customer questions instantly at the point of purchase intent.

Learn more

Returns & Exchanges

Bookbag walks customers through your return policy, initiates return requests, and generates labels — all without a human in the loop.

Learn more

FAQ Automation

Bookbag is trained on your store's policies, guides, and FAQ content — instantly answering your most common questions across chat, email, and SMS.

Learn more

Let Bookbag handle it for you

Join the ecommerce teams resolving more tickets, answering 24/7, and turning support into a revenue channel with Bookbag.

Book a demo See pricing