Thai Cat vs Siamese: The Old Style and the New, From the Documents

The Thai IS the old-style Siamese, formalised. TICA calls it "the living equivalent of the original Wichien-maat of ancient Siam", and TICA and FIFe recognize both cats as fully separate breeds, with the Siamese as the Thai's one permissible outcross. That much every blog gets roughly right. What the blogs get wrong, we checked against the standards themselves, and two corrections below are the reason this page exists. (One scope note up front: this page compares the internationally recognized, Siamese-descended Thai. GCCF's UK "Thai" is a different, Korat-descended population, covered in the closing note.)

Weight: a real registry-stated gap, not a rounding artifact

TICA's own boxes put the Thai heavier at both ends: Thai females 7-9 lb (3.2-4.1 kg) and males 9-12 lb (4.1-5.4 kg), against Siamese females 5-8 lb (2.3-3.6 kg) and males 8-12 lb (3.6-5.4 kg). Both breeds' standards also converge on the same qualitative hook: the Thai is "heavier than it looks". Neither registry gives a height figure at all. That is why the inch-figures circulating on comparison blogs (11-14 inches; "up to 23 inches") are unverified against any primary source, and we publish neither.

The head: wedge, not apple, in both registries' own words

Neither TICA's nor FIFe's standard uses the word "apple" anywhere. Both describe the Thai's head as a modified WEDGE, rounder-cheeked and shorter-muzzled than the modern Siamese's long tapering wedge. TICA's own page addresses the popular term directly: "applehead" is a colloquial American nickname, not an official breed name. We note the nickname exists because readers arrive with it. The registries' own word is wedge, and the Siamese silo's old-style page tells that fuller story.

The tail: a checked correction

A ranking comparison site claims the Thai has a "shorter tail". FIFe's current standard says the opposite in three words: the tail is "as long as the body". The claim is wrong at the primary source, and we publish the correction rather than the echo.

Temperament: shared registry cluster, one uncorroborated blog claim

Both breeds' TICA pages independently describe the same cluster: vocal, athletic, intelligent, people-glued, poor at being left alone. The Thai page's own line is the richest quote in the file ("living with these cats is like living with small children... emotionally, they are high maintenance"). One circulating contrast, that the Thai "warms to strangers faster", appears in no registry document we read. It stays credited to the blogs that assert it.

Scale: the 1-to-5.8 fact nobody quotes

A European-mainland pedigree dataset (Pistorius & Blokker 2021) counts roughly one Thai entry for every 5.8 Siamese entries (4,998 against 28,770). It finds the Thai population carrying markedly LOWER kinship and inbreeding than the modern Siamese it descends from, with "no signs of inbreeding depression": a rare, measured, positive population finding, and honest context for why prices and waitlists differ. On price itself: no source anywhere sets a Thai figure directly against a Siamese one, an absence we state rather than fill.

The closing note: GCCF's Thai is a different cat

In the UK, GCCF's "Thai" (Thai Blue Point, Thai Lilac, Thai Lilac Point) is a KORAT-descended population: in GCCF's own words, a different cat from the Siamese-descended breed this page compares, with its own DNA-testing regime. If you are reading UK papers, check which Thai they mean. Our Thai profile's registry section maps the whole split.