Boohoo sizes US 0 through 26, with Tall and Plus extensions on select pieces. Sizing runs slightly small in non-stretch basics and true in stretch fabrics. Always use the item-level size chart, because pattern grading varies meaningfully between cuts.
We tracked Boohoo’s sizing reality for Tumbleweed Thrift readers because the brand uses UK-original sizing converted to US labels, which trips up first-time shoppers, and the brand-wide chart is less reliable than item-level charts on the product pages. Boohoo sits inside our Fast Fashion Dtc coverage where sizing inconsistency is one of the most common complaints. The honest read: the brand’s plus and tall extensions are genuine pattern grading, not stretched standards, but the standard size grading is loose enough across the catalog that reading per-item charts is the only reliable path.
Boohoo standard size chart
Boohoo’s standard sizes convert UK-original sizing to US labels, per the brand’s current size guide. UK 8 maps to US 4, UK 10 to US 6, UK 12 to US 8, UK 14 to US 10, and so on in two-point steps. The brand-wide chart publishes bust, waist, and hip measurements in inches per size, with US 4 typically running 33 bust, 26 waist, 36 hip and US 12 running 41 bust, 34 waist, 44 hip. These numbers are the brand-wide reference; the actual fit per garment varies with cut and fabric, which is why the item-level chart is the one that matters.
Boohoo Plus size chart
Boohoo Plus covers sizes 14 through 26, with genuine plus pattern grading on most pieces, per the brand’s current size guide. The bust, waist, and hip increments scale at proper plus rates rather than the stretched-XL approach that some fast-fashion brands take. Plus sizing also accommodates fuller bust grading on cocktail and party dresses, which is a genuine strength versus Princess Polly’s Curve assortment. Verify per-item; some Plus pieces still run small in the bust if the cut is structured. See Plus-Size Contemporary Fashion for the broader plus-size picture.
Boohoo Tall size chart
The Tall extension applies to select pieces, with inseam grading and torso adjustment for six-foot-plus heights, per the brand’s current Tall size guide. Standard Tall pieces add roughly two inches to the inseam on bottoms and roughly one to two inches to torso length on tops. Sleeve length on Tall tops also extends accordingly. The Tall assortment is smaller than the standard catalog; filter early if you live in this extension to avoid wasted browse time.
How Boohoo sizing compares to Princess Polly and ASOS Design
Boohoo runs slightly smaller than Princess Polly in basics and dresses, and slightly smaller than ASOS Design across the board. Princess Polly uses AU-original sizing converted to US, which often produces a half-size larger fit than the US label suggests. ASOS Design is the closest of the three to standard US sizing, with reliable pattern grading across the catalog. If you’re sizing across brands, expect to take one US size up at Boohoo versus your usual Princess Polly or ASOS Design size in non-stretch basics.
How to read Boohoo size charts properly
Always click into the item-level size chart on the product page rather than relying on the brand-wide chart. The item-level chart shows the actual cut measurements for that piece, which can vary by an inch or more from the brand-wide reference. Cross-reference your measured bust, waist, and hip against the item chart, not your usual size label. Pay attention to the fabric stretch indicator, which the brand publishes on most product pages; the stretch level changes how the size chart should be interpreted.
Boohoo sizing landmines to know
Armhole tightness on dresses is the most common fit complaint, especially on cap-sleeve and bodycon cuts. Bust accommodation on cocktail bodices runs small for fuller-busted shoppers; size up if you’re between sizes for these specific cuts. Sleeve length on standard tops runs slightly short for taller wearers (the Tall extension solves this). Waistband sizing on non-stretch denim runs small; size up if you’re between sizes. Stretch leggings and bodycon pieces run true to size or slightly large; size down if you’re between.
What to do if you’re between sizes
Read the item-level reviews first; reviewers consistently flag whether a piece runs small, large, or true in the comments. For non-stretch dresses and denim, size up. For stretch leggings and bodycon, size down or stay true. For statement pieces with structured construction (corset tops, bodice cocktail dresses), size up by one. The variance across the catalog is real, and the per-item review thread is the most reliable single source for fit calibration.
Boohoo Men’s sizing notes
Boohoo Men runs XS through XXXL with Tall and Plus extensions on select pieces. Sizing runs slightly small in non-stretch basics and true in stretch. Tall extends inseam two-plus inches; Plus extensions cover XXXL on tops and select bottoms. See Boohoo Men for the full men’s review and category breakdown.
FAQ
Does Boohoo run small or true to size?
Slightly small in non-stretch basics and dresses, true in stretch fabrics, per the brand-wide and item-level charts. Size up if you’re between sizes for non-stretch pieces.
Is Boohoo Plus real plus pattern grading?
Yes for most Plus pieces, with proper bust, waist, and hip increments rather than stretched-XL grading. Some structured cuts still run small in the bust; verify per-item.
How does Boohoo sizing compare to Princess Polly?
Boohoo runs about a half-size smaller than Princess Polly across most basics and dresses. Take one US size up at Boohoo versus your usual Princess Polly size for non-stretch pieces.
What’s Boohoo Tall sizing?
Tall extensions add roughly two inches to inseams and one-to-two inches to torso length on select pieces. Designed for six-foot-plus heights with proper grading.
Should I size up or down for Boohoo bodycon dresses?
For stretch bodycon, stay true to size or size down if you’re between. For structured bodycon with non-stretch fabric, size up. Read item-level reviews for fit calibration.
The bottom line
Boohoo sizing is workable once you calibrate to the brand’s slight small-running tendency in non-stretch basics. Use item-level charts, not the brand-wide reference. Size up for non-stretch dresses and denim; stay true or size down for stretch. The Plus and Tall extensions are genuine, not afterthought, which makes the brand worth using if you live in either. Read reviews; they flag the misses honestly. Browse current Boohoo inventory: Boohoo Dress on Amazon.
For the wider Boohoo picture, see Boohoo, Boohoo Men, Boohoo Shipping, Is Boohoo Legit, and Fast Fashion Dtc for the hub.
