157 known values for skin with current usage counts:

1. default (22253× used)
2. red (16743× used)
3. green (11197× used)
4. follower (4280× used)
5. clown (1173× used)
6. trapper (1074× used)
7. cool_cap (943× used)
8. vampire (876× used)
9. lab_apprentice (802× used)
10. daisy (671× used)
11. helmet_banana (554× used)
12. snowman (552× used)
13. og_white (476× used)
14. anniversary (453× used)
15. rural_fella (413× used)
16. party_hat (394× used)
17. gingerbread (306× used)
18. panda (228× used)
19. gift_box (222× used)
20. monk (214× used)
21. pumpkin (212× used)
22. black_dog (195× used)
23. og_purple (184× used)
24. dog (164× used)
25. builder (163× used)
26. anniversary_2 (162× used)
27. edm (160× used)
28. toaster (141× used)
29. demon (138× used)
30. tea_cup (125× used)
31. og_yellow (119× used)
32. cyborg_3 (109× used)
33. og_pink (108× used)
34. cyborg_1 (91× used)
35. bad_cap (90× used)
36. reindeer (89× used)
37. grim_reaper (89× used)
38. green_spikes (86× used)
39. elf (84× used)
40. detective (75× used)
41. king (69× used)
42. wizard (67× used)
43. evil_bot (66× used)
44. mad_scientist (63× used)
45. cubix (63× used)
46. joker (61× used)
47. narwhal (61× used)
48. grey_cat (60× used)
49. white_demon (59× used)
50. orca (59× used)
51. sushi (54× used)
52. eliminated (53× used)
53. headset (53× used)
54. yeti (52× used)
55. cat (50× used)
56. mummy (49× used)
57. peach (49× used)
58. spikes (48× used)
59. rplace (47× used)
60. parrot (46× used)
61. shades (45× used)
62. security_bot (44× used)
63. fries (42× used)
64. anniversary_3 (40× used)
65. ninja (39× used)
66. murica (37× used)
67. siren (37× used)
68. angel (36× used)
69. lunar_dragon (36× used)
70. alien (34× used)
71. wolf (33× used)
72. bow_tie (33× used)
73. top_hat (33× used)
74. cyborg_2 (31× used)
75. icefox (30× used)
76. country_nl (30× used)
77. ghost (27× used)
78. astronaut (27× used)
79. devil (26× used)
80. shark_attack (24× used)
81. ramen (23× used)
82. festive_lights (22× used)
83. whale (22× used)
84. apple (20× used)
85. rabbit (20× used)
86. treasure_chest (20× used)
87. monkey (19× used)
88. bee_costume (19× used)
89. bandit (18× used)
90. tiger (18× used)
91. country_de (17× used)
92. country_us (17× used)
93. block (17× used)
94. bunny_costume (16× used)
95. blue_dinosaur (16× used)
96. banana (16× used)
97. firefox (16× used)
98. scuba_diver (15× used)
99. science_adept (15× used)
100. curious_bot (15× used)
101. cow (15× used)
102. country_fr (13× used)
103. shape (13× used)
104. boby (13× used)
105. country_gb (12× used)
106. fairy (12× used)
107. leprechaun (12× used)
108. burger (12× used)
109. pirate (12× used)
110. country_se (12× used)
111. country_pl (12× used)
112. mecha (11× used)
113. dinosaur (11× used)
114. country_au (11× used)
115. carrot_costume (11× used)
116. polar_bear (11× used)
117. country_il (11× used)
118. steampunk (10× used)
119. spy (10× used)
120. country_be (10× used)
121. burglar (10× used)
122. country_fi (9× used)
123. graffiti (8× used)
124. country_no (8× used)
125. country_cz (7× used)
126. cardboard_box (7× used)
127. hamster (7× used)
128. pig (7× used)
129. country_ro (7× used)
130. unicorn (7× used)
131. fossil (7× used)
132. mark (6× used)
133. red_cocoa (6× used)
134. country_it (6× used)
135. nutcracker (6× used)
136. country_gr (6× used)
137. firefighter (6× used)
138. country_es (5× used)
139. country_ca (5× used)
140. buffalo (5× used)
141. country_hu (5× used)
142. country_ch (4× used)
143. pineapple (4× used)
144. yellow_crown (4× used)
145. green_cocoa (4× used)
146. country_ru (4× used)
147. stinger (3× used)
148. jailbreak (3× used)
149. popcorn (3× used)
150. country_si (3× used)
151. country_hr (3× used)
152. alice (2× used)
153. blue_crown (2× used)
154. april_fools (1× used)
155. laurel (1× used)
156. white_crown (1× used)
157. black_crown (1× used)