World Ranking of Merino Wools Australian Superfine, Saxon Merino, Rambouillet, ZQ: over 25 merino wool varieties ranked by micron fineness, fibre length, resilience and price per kg. IWTO, CSIRO and Woolmark data. Interactive ranking of 25+ merino wools Filter by fineness, usage or certification. Click a card to expand details. Ranking methodology Our merino wool ranking is based on a rigorous evaluation protocol using 15 quantitative criteria measured in laboratory conditions according to international IWTO standards. Each variety was tested on a minimum of five samples from different lots to ensure statistical representativeness. Data was collected from four complementary sources: IWTO protocols (global benchmark for wool classification), CSIRO research (Australia), the Woolmark programme (quality certification) and the Australian Wool Testing Authority (AWTA). For ethical certifications, we cross-reference RWS and ZQ data. Each variety receives a composite grade (A+ to C): micron fineness 35%, staple length 20%, tensile strength 20%, comfort factor 15% and clean yield 10%. Indicative pricing does not factor into the quality grade. Variety selection 25+ varieties selected based on commercial relevance and availability on international markets. Inclusion criteria: annual production over 100 tonnes, IWTO test data available, documented use in luxury fashion. Heritage varieties are included for historical interest even if production falls below the standard threshold. AWTA database, IWTO Market Intelligence reports, Woolmark data. IWTO criteria Micron fineness (IWTO-12) is the single most determining factor. Measured by OFDA or Laserscan, it determines the wool category: ultrafine (<15.5 microns), superfine (15.6-18.5), fine (18.6-20), medium (20.1-23). Each micron of difference represents roughly 10-15% price differential on the world market. IWTO-12, OFDA 4000, Laserscan. Temperature 20C, 65% humidity. Minimum 5 measurements per lot. OFDA/Laserscan protocols Two reference instruments for fineness measurement. OFDA projects a light beam across 4,000 fibres and measures individual diameters. Laserscan uses a helium-neon laser on 2,000 suspended fibres. Both methods correlate within 0.3 microns. OFDA is preferred in Australia, Laserscan in Europe and New Zealand. IWTO-47 (OFDA), IWTO-12-03 (Laserscan). Resolution 0.1 micron. Calibrated on IWTO standards. CSIRO data sources CSIRO (Australia) is the world's most advanced wool research centre. Its breeding programmes have reduced average Australian merino fineness from 22 to 17 microns over 30 years. We use CSIRO data for fibre physical characteristics, fineness-price correlations and market projections. CSIRO Wool Quality Report (annual), Australian Wool Innovation (AWI) Industry Data. Grading scale (A+ to C) A+: exceptional merino, reserved for the top 3-4 global varieties (ultrafine <15 microns). A: excellent superfine quality for luxury. A-: very good upper fine quality. B+: good standard fine quality. B: premium medium quality. B-: entry-level premium. C: standard quality, blends. Var.: quality dependent on base variety (certified, recycled). Verification and limits All data is publicly verifiable via IWTO and AWTA databases. Indicative prices are calculated from Australian Wool Exchange (AWE) auction sales over the past 12 months. Limitation: fineness measurements vary by 0.5 microns depending on sample and shearing conditions. Prices fluctuate 10-20% by season and Chinese market demand. Edge cases: cashmere vs merino Ultrafine merino (11.5-15.5 microns) overlaps the cashmere fineness range (14-16 microns). Key differences: cashmere comes from goats, merino from sheep. Cashmere is lighter (35-50 g/sqm vs 80-150) but less resilient. Ultrafine merino offers comparable hand feel with 2-3x greater durability and 30-50% lower price. Cashmere-merino blends (30/70 or 50/50) are an excellent performance-price compromise. For journalists requesting additional data or an interview: Frequently asked questions: merino wools Everything about merino wool varieties, their properties, certifications and uses. Data from IWTO, CSIRO and Woolmark. What is the difference between Australian and New Zealand merino? Australian merino is generally finer (11.5-19 microns) thanks to decades of breeding for fineness. NZ merino (ZQ) offers slightly longer fibres (80-120 mm vs 65-90 mm) with a mulesing-free guarantee since 2018. Australia produces 80% of global superfine merino. For luxury fine knitwear, Australian superfine (15-17 microns) is the benchmark. For technical outdoor, NZ ZQ (18-20 microns) offers the best performance-ethics balance. What do microns mean for merino wool? The micron measures fibre diameter (one thousandth of a millimetre). Lower means finer and softer. Below 15.5 microns (ultrafine), the hand feel rivals cashmere. 15.6-18.5 microns (superfine) suits luxury suiting and knitwear. 18.6-20 microns (fine) is ideal for premium ready-to-wear. Above 20 microns (medium) is used for classic jumpers and blends. Each micron difference represents roughly 10-15% price differential. Why does merino wool sometimes feel prickly? Prickliness relates to the prickle factor: the percentage of fibres over 30 microns. Below 18.5 microns average, the prickle factor is near zero (under 1% of fibres exceeding 30 microns). The comfort factor (fibres under 30 microns) must exceed 99% for zero-prickle sensation. Superfine and ultrafine merino (<18.5 microns) guarantees total comfort even next-to-skin. Medium merino (20-23 microns) may prickle for sensitive wearers. Merino vs cashmere: which to choose? Cashmere (14-16 microns) is lighter and softer at first touch, but ultrafine merino (11.5-15.5 microns) offers comparable hand feel with 2-3x greater durability. Merino recovers better from stretching, resists pilling better and tolerates machine washing (wool cycle). Cashmere is more fragile and requires dry cleaning. Ultrafine merino costs 30-50% less than equivalent cashmere. Cashmere-merino blends (30/70) offer an excellent compromise. What is the difference between RWS and ZQ certification? RWS (Responsible Wool Standard) is a global standard certifying animal welfare and sustainable land management across all origins. ZQ is a stricter New Zealand programme: total mulesing ban, farm-to-product traceability, on-site annual audits, plus fibre quality criteria. RWS is more widely available globally; ZQ is the premium ethical benchmark. At Misciano, we require one or the other for all wool sourcing. How does merino provide thermoregulation? Merino fibre has a unique dual-layer structure: a hydrophilic cortex absorbing up to 35% of its weight in moisture without feeling wet, and a hydrophobic cuticle repelling surface droplets. This wicking mechanism keeps a dry air layer near the skin. Additionally, the natural crimp (80-100 crimps/cm for superfine) creates insulating air pockets. Result: merino warms in cold and cools in heat, unmatched by synthetic fibres. What about mulesing and merino wool ethics? Mulesing is a controversial surgical practice removing skin around the lamb tail to prevent flystrike. Practised in Australia, it has been banned in New Zealand since 2018. Alternatives exist: breeding for plain-bodied sheep, metal clips, preventive treatments. ZQ and RWS exclude farms practising mulesing without anaesthesia. At Misciano, we source only from certified non-mulesing farms. Why is superfine merino so expensive? Superfine (15.6-18.5 microns) represents less than 10% of global merino production. Superfine sheep produce 3-4 kg of wool per year (vs 6-8 kg for standard merino), with 55-65% clean yield. Breeders have invested in genetic selection for generations, with stud rams at 15-17 microns valued at 20,000-50,000 AUD. China absorbs 70% of Australian superfine, creating constant upward pressure. Result: 25-40 USD/kg for superfine vs 12-15 USD/kg for standard 21-micron. Does organic merino wool exist? Yes, but it represents less than 1% of global merino production. GOTS certification requires pesticide-free pastures for minimum 3 years, no chemical treatment on animals, and full farm-to-product traceability. Main organic origins: Australia (Tasmania), New Zealand and Argentina (Patagonia). The premium is 15-25% over conventional RWS-certified merino. At Misciano, we offer RWS merino pieces and are exploring GOTS sourcing for future collections. How to wash a merino wool garment? Superfine merino is machine washable on wool cycle (30C max, gentle spin 400 rpm). Use enzyme-free detergent (Woolite or Eucalan type). Never use fabric softener (it clogs fibre scales). Dry flat on a towel, away from direct heat. Ultrafine (<15.5 microns) is more delicate: hand wash recommended, or use a mesh bag in machine. Ironing is rarely needed thanks to merino natural resilience. What is the history of the merino breed? Merino originated in Spain, where the Crown of Castile held a breed monopoly from the 12th to 18th century. Exporting merino sheep was punishable by death. In 1797, King Charles IV sent a flock to Australia via South Africa. Saxon Merino was developed in Saxony (Germany) from 1765, becoming the finest strain (12-14 microns). French Rambouillet, created in 1786 at the national sheepfold, is the European reference strain. Today, Australia dominates with 75 million merino sheep, producing 80% of global superfine wool. Can you wear merino in summer? Yes, merino is a four-season fibre. Its natural thermoregulation works in summer and winter alike. A superfine merino t-shirt (17-18 microns, 150-180 g/sqm) is cooler than cotton in hot weather because the fibre wicks moisture actively rather than absorbing it passively. Merino is also naturally odour-resistant (the fibre absorbs odour molecules and releases them during washing), allowing multi-day wear without smell. For summer, choose lightweight (130-170 g/sqm) and fineness under 18.5 microns.