Size

Size (abbr. Siz)—This statistic determines the height of your character in inches, as well as the sheer mass and weight.

HIGH SIZE = You are BIG and thus inflict huge damage in melee and parry attacks with ease. You also start with more hit points. The tradeoff is that the bigger you are the more damage you recive and you can't enter certain areas due to your size. Also keep in mind that it usually takes more time for big races to regenerate their hp/sp/ep.

LOW SIZE = You're as small as a house cat. This means you are difficult to hit and dodging blows comes easilly for you. You will also recieve less damage from enemy attacks. The tradeoff is that you will inflict very low damage in melee, start with small number of hp and will be stunned more often by certain skills (like shove).

 Height Siz Races 20ft 240 Behemoth, Titan; Chimaera, Tuatara ~~ ~~ 16ft 192 Giant ~~ ~~ 13ft 156 Treant+4in 12ft 144 Arcanus, Yaag-nesh; Tianlong 11ft 132 Dragon+8in, Ettin+6in 10ft 120 Homarid, Kreen, Slaad, Qookie+5in; Mephistacles+6in, Vanir+6in 9ft 108 Troll; Efreeti+6in, Seraphim+5in, Wendigo+5in 8ft 96 Tortle+4in, Minotaur 7ft 84 Tywimn+6in, Vipyr+6in, Anakim+3in, Boelir, Centaur, Devil, Drensieqi; Revenant+2in, Sidhe+2in, Sluagh+2in, Valkyrie+2in 6ft 72 Shadow+8in, Suula+8in, Thuul+8in, Flynd+6in, Jinn+4in, Kizanki+4in, Kuroa+3in, Bloodworm, Changeling, Dhampir, Dragonian, Gargoyle, Hephestian, Human, Irrdu, Kanku, Mummy, Muridan, Selkie, Unicorn, Uruk, Vampire, Werewolf, Xodar; Golemn+3in, Harpy 5ft 60 Pudding+10in, Gorgon+8in, Catfolk+4in, Elf, Illex, Myconoid, Satyr; Dryad+2in, Kitsune+4in, Nekomata+6in, Xlakun'ah+2in 4ft 48 Goblin+2in, Dwarf, Vulpin; Rusalka+6in 3ft 36 Gnome+4in, Arakun, Argus 2ft 24 Leprechaun+8in 1ft 12 Gremlin+8in, Atomy, Papua; Ahrimazda, Phoenix+8in

Thus the helpfile. Now a hypothesis on the mechanics.

Size values are floating point numbers. Pick a race. Let $S_H$ be the size, in inches, stated in the race helpfile. The starting size, when the character is created, is

(1)
\begin{align} \quad S_\min = 0.9 S_H \end{align}

and this is also the size which a character of the race will get if sie takes the minimal size wish at creation. If size is increased when gaining levels, the increment is

(2)
\begin{align} \quad I = 0.01 S_H \end{align}

and the size of a character who takes the maximal size wish at creation will be

(3)
\begin{align} \quad\quad S_\max = S_\min + 29 I = 1.19 S_H \end{align}

upon reaching level 29, when growth ends. Without size wishes, the probability of the size increasing when advancing a level between 1 and 29, inclusive, is $P = 0.5$ and the expected value of the size of a wishless character is

(4)
\begin{align} \quad\quad E(S) = S_\min + 29 P I = 1.045 S_H\ldotp \end{align}

In the output of the score command and in similar places, the size is shown truncated, i. e. rounded down.

Basing on the formulas above one calculate the chance of getting given size after full growth period, with no wishes:

 % of $S_H$ % of E(S) % chance of getting exactly this size % chance of getting this or lower size % chance of getting this or bigger size 90 86.12 0.00000019 0.00000019 100.00000000 91 87.08 0.0000054 0.0000056 99.9999998 92 88.04 0.000076 0.000081 99.999994 93 89.00 0.00068 0.00076 99.99992 94 89.95 0.0044 0.0052 99.9992 95 90.91 0.022 0.027 99.995 96 91.87 0.088 0.116 99.973 97 92.82 0.29 0.41 99.88 98 93.78 0.80 1.21 99.59 99 94.74 1.87 3.07 98.79 100 95.69 3.73 6.80 96.93 101 96.65 6.44 13.25 93.20 102 97.61 9.67 22.91 86.75 103 98.56 12.64 35.55 77.09 104 99.52 14.45 50.00 64.45 105 100.48 14.45 64.45 50.00 106 101.44 12.64 77.09 35.55 107 102.39 9.67 86.75 22.91 108 103.35 6.44 93.20 13.25 109 104.31 3.73 96.93 6.80 110 105.26 1.87 98.79 3.07 111 106.22 0.80 99.59 1.21 112 107.18 0.29 99.88 0.41 113 108.13 0.088 99.973 0.116 114 109.09 0.022 99.995 0.027 115 110.05 0.0044 99.9992 0.0052 116 111.00 0.00068 99.99992 0.00076 117 111.96 0.000076 99.999994 0.000081 118 112.92 0.0000054 99.9999998 0.0000056 119 113.88 0.00000019 100.00000000 0.00000019