Player installing unbranded strings on a generic ukulele at a work mat — AI-generated editorial scene; it does not show a tested or recommended exact string set.

Stock and specifications checked July 18, 2026

Best ukulele strings by scale and tuning

Read the instrument before the packet. Soprano, concert, tenor and baritone sets can share four strings while requiring different speaking lengths, pitches, gauges and wound-string construction.

We checked maker gauges, intended tuning, construction, origin, current direct ordering and specialist stock. We did not install, play or compare these sets. Material descriptions are identifiers, not promises about how a particular instrument will sound or feel.

Compare the label that must match

Exact four-string sets checked July 18, 2026
Set	Instrument	Tuning	Construction	Do not substitute when
Aquila 4U	Soprano	GCEA, high G	Four plain New Nylgut strings	You need concert length or low G
D’Addario EJ87C	Concert	GCEA, high G	Four titanium monofilaments	The instrument is tenor or baritone
D’Addario EJ99TLG	Tenor	GCEA, low G	Four fluorocarbon monofilaments	You want re-entrant high G
D’Addario EJ88B	Baritone	DGBE	Two Nyltech plain, two silver-plated copper wound	The instrument uses GCEA

Decode the packet without guessing

Scale length

The vibrating distance from nut to saddle. It determines the tension a gauge reaches at a pitch. Measure that distance or identify the maker’s exact model. Overall body size is not the scale measurement.

High G

A G4 fourth string above middle C in standard re-entrant GCEA. It preserves the non-linear pitch order associated with common uke voicings. Choose a packet explicitly marked high G or standard GCEA. The physically top string is not necessarily the lowest note.

Low G

A G3 fourth string one octave below high G. It changes range and may require a thicker string. Confirm both low-G labeling and nut-slot fit before tensioning. Detuning an ordinary high-G string does not create a usable low G.

DGBE tuning

The common baritone tuning matching the top four guitar strings. Its pitches differ from GCEA sets. Use a baritone DGBE packet unless the instrument maker specifies otherwise. Baritone is not simply a longer GCEA tenor.

Monofilament

A string formed from one continuous synthetic strand. Its printed diameter identifies fit more reliably than color. Compare gauges and positions before removing all old strings. “Carbon,” titanium and Nylgut labels do not mean metal wire construction.

Wound string

A core wrapped with fine metal wire. It can make a lower pitch without an impractically thick plain string. Check for burrs and a compatible nut slot; wipe it after playing. Visible metal does not make a ukulele set interchangeable with steel guitar strings.

Gauge

The string diameter, usually stated in inches or millimetres. Large changes affect nut fit and tension. Keep the packet and record all four diameters. A larger gauge number is thicker, not a higher pitch.

Speaking length

The part of the string between nut and saddle that vibrates. Extra packet length alone does not prove the gauge suits the scale. Match the intended instrument category, not merely whether the string reaches the tuner. A string that is physically long enough is not automatically compatible.

Four exact lanes, not four tonal promises

Soprano high-G replacement

Aquila 4U New Nylgut

This exact 4U packet is for a soprano ukulele in GCEA with a re-entrant high G. Aquila’s technical chart identifies four plain gauges; Thomann labels it a category best seller and Sweetwater lists the exact 4U.

Advantage: exceptionally clear exact-model evidence across maker chart and both anchor retailers.

Drawback: the white plain strings can look similar, so preserve their position order.

Avoid if: the label says concert, tenor, baritone or low G.

Closest alternative: EJ87C for a concert-scale high-G instrument.

Verify: “4U,” soprano, GCEA and high G are all printed or confirmed.

Confidence: high for identity and current stock; no performance claim.

Concert high-G monofilament

D’Addario EJ87C Titanium

EJ87C is maker-specified for concert ukuleles in standard GCEA. D’Addario states .025, .033, .040 and .029-inch titanium monofilament gauges and New York manufacture.

Advantage: exact gauges, target scale, pitch order and per-string tensions are published.

Drawback: “titanium” can be misread as metal; these are synthetic monofilaments.

Avoid if: changing to low G or maintaining a baritone.

Closest alternative: Aquila 4U for soprano high G.

Verify: SKU EJ87C, concert and GCEA; do not accept EJ87S or EJ87T as the same set.

Confidence: high for current maker identity; medium-high for region-specific stock.

Tenor low-G without a wound fourth

D’Addario EJ99TLG Pro-Arté Carbon

EJ99TLG is an all-fluorocarbon tenor set optimized for low-G GCEA. The .0413-inch fourth string is plain, unlike many wound low-G choices; both Thomann and Sweetwater showed it immediately orderable.

Advantage: exact low-G identity and unusually strong cross-market stock evidence.

Drawback: the thicker plain fourth may expose a too-narrow nut slot.

Avoid if: the owner wants traditional high-G re-entrant tuning.

Closest alternative: a maker-approved scale-specific wound low-G set fitted by a repairer.

Verify: EJ99TLG, tenor, low G, and .0413 fourth; never force it into the nut.

Confidence: high for product and stock; fit remains instrument-specific.

Standard baritone DGBE

D’Addario EJ88B Nyltech

EJ88B is for baritone DGBE, with .026 and .036 Nyltech plain strings plus .024 and .030 silver-plated copper wound strings. D’Addario, Thomann and Sweetwater all retain the exact SKU.

Advantage: the packet clearly separates baritone pitch and mixed construction from GCEA sets.

Drawback: two wound strings require inspection for wear and rough edges.

Avoid if: the instrument or teacher specifies GCEA baritone tuning.

Closest alternative: another exact DGBE baritone set after comparing gauges and bridge type.

Verify: EJ88B and DGBE; EJ87B and EJ99B are different products.

Confidence: high for exact current identity and US/EU stock.

Physical and support facts before opening

Exact-set due diligence before opening
Product	Size and weight	Materials	Manufacturing origin	Brand background	Warranty and support
Aquila 4U New Nylgut Soprano High G	Gauges .024, .031, .037, .026 in; packet weight not disclosed	Four plain New Nylgut synthetic strings	Made in Italy; current retailer/manufacturer responsibility data	Aquila Corde Armoniche, Vicenza-area Italy; synthetic and historical strings	No exact set warranty term found; retain receipt and use seller/maker defect support
D’Addario EJ87C Titanium Concert	Gauges .025, .033, .040, .029 in; packet weight not disclosed	Four titanium synthetic monofilaments, tie-end	Made in USA at New York facility	D’Addario, New York; family string-making roots traced to 1600s, US company established 1974	Normal wear excluded; defect claim requires receipt and authorization under regional terms
D’Addario EJ99TLG Pro-Arté Carbon Tenor Low-G	Gauges .0205, .026, .0319, .0413 in; 43.8 lb published total tension	Four clear fluorocarbon monofilaments, tie-end	Made in USA at New York facility	D’Addario, New York; strings and music accessories	Normal wear excluded; contact seller or maker before returning a defective set
D’Addario EJ88B Nyltech Baritone	Gauges .026, .036, .024w, .030w in; packet weight not disclosed	Two Nyltech plain; two silver-plated copper wound on nylon; tie-end	Made in USA at New York facility	D’Addario, New York; strings and music accessories	Normal wear excluded; proof of purchase and return authorization may be required

Packet identity checker

Instrument scaleRequired tuning

Select the scale and tuning shown by the instrument maker or teacher.

Three buyer tools that prevent a wasted set

Four-photo handoff

Ask the owner for the headstock, bridge, inside label and current fourth string. Add a ruler photo from nut to saddle. A proxy buyer can then show a specialist the actual scale, tie system and wound/plain construction.

Nut-slot stop test

Before tensioning, the replacement should sit in its slot without force. A string riding above or binding in the slot is a repair question, not an invitation to saw, file or pull harder.

One-string change log

Record old and new packet codes, tuning and date. Change one string at a time if the bridge parts are loose, leave useful winding length, stretch gradually, and retune repeatedly before judging stability.

What this shortlist deliberately leaves out

Aquila 15U was excluded despite a current maker identity because the checked B&H exact page says no longer available and the European listing evidence was mixed. Worth BM remains an interesting current fluorocarbon option, but it was not needed to displace a scale/tuning lane and its 46-inch format invites proxy buyers to treat length as compatibility. Six- and eight-string sets, guitalele strings, steel strings and generic marketplace multipacks are separate decisions.

How the lanes were selected

Each inclusion required an exact current SKU, maker-stated scale and tuning, published construction, ordinary ordering evidence and a distinct buyer job. Thomann anchors European availability; Sweetwater or B&H anchors US specialist availability. Retailer rating counts support popularity only where stated. We did not convert maker descriptions into independent sound findings.

Inspect before cutting

Confirm all four packet identifiers while the seal and receipt remain intact. Lay each new string beside its labeled position, check for kinks or damaged winding, and understand the bridge knot before removing the old string. Trim only after the instrument reaches stable pitch. If a slot binds, a bridge part lifts, or the top distorts, detune and ask a qualified repairer.

Sources and correction path

Report a factual correction. Recheck packet SKU, tuning, stock and seller terms immediately before ordering.